Supertex inc. HV9964 CCM Boost LED Driver with Sub-Microsecond PWM Dimming and Open Loop Protection Features Switch-mode controller for single switch converters Boost SEPIC Current loop closed with sub-microsecond PWM dimming pulses supports PWM dimming >20kHz High PWM dimming ratio (>10,000:1) Internal 40V linear regulator Internal 2% voltage reference Programmable constant frequency operation Programmable slope compensation Programmable soft start 10V, +0.25A/-0.5A MOSFET gate drivers Hiccup mode protection for both short circuit and open circuit conditions Latching protection from open loop Active-Low, open-drain output to indicate a fault condition Applications LED backlights for LCD Displays General Description The HV9964 is a current mode control LED driver IC designed to control single switch PWM converters (boost or SEPIC) in a constant frequency mode. The controller uses a peak current-mode control scheme (with programmable slope compensation) and includes an internal transconductance amplifier to accurately control the output current over all line and load conditions. The IC also provides a load switch gate drive output, which can be used to disconnect the LEDs in case of a fault condition using an external load switch. The 10V external FET drivers allow the use of standard level FETs. The low voltage 5V AVDD is used to power the internal logic and also acts as a reference voltage to set the current level. The HV9964 features Supertex' proprietary PWM dimming control algorithm achieving a dimming pulse of a few hundred nanoseconds from a continuous conduction mode (CCM) or discontinuousconduction mode (DCM) boost converter, while maintaining the instantaneous LED constant current determined by the reference voltage input. This feature permits dimming frequency outside of the audible range. The feature can also yield a wide dimming ratio in excess of 10,000:1 at low dimming frequency. The HV9964 provides a full protection feature set, including outputshort and open-circuit protection with auto-restart, and latching open-loop protection with an open-drain flag output. The HV9964 is powered by a built-in 40V linear regulator. Typical Boost Application Circuit L1 CIN CPVDD RT PVDD RT RSC VIN GT CS PWMD HCP CHCP CC CO GND OVP SS COMP AVDD CSS ROVP1 ROVP2 RCS HV9964 FLT Doc.# DSFP-HV9964 A100112 D1 Q1 R CAVDDR1 DIS IREF Q2 FB RS RR2 Supertex inc. www.supertex.com HV9964 Ordering Information Pin Description Part Number Package Options Packing HV9964NG-G 16-Lead SOIC 45/Tube HV9964NG-G M934 16-Lead SOIC 2500/Reel AVDD 1 16 FLT VIN 2 15 HCP DIS 3 14 OVP PVDD 4 -G indicates package is RoHS compliant (`Green') 13 PWMD GT 5 12 FB GND 6 CS 7 10 COMP RT 8 9 SS 16-Lead SOIC (NG) Absolute Maximum Ratings Parameter Top Marking Value HV9964NG VIN to GND -0.5V to +45V YWW PVDD to GND -0.3V to +12V Bottom Marking -0.3V to (PVDD +0.3V) CCCCCCCCC AAA GT, DIS to GND 11 IREF AVDD to GND -0.3V to 6.0V IREF to GND -0.3V to 3.0V All other pins to GND -0.3V to (AVDD +0.3V) Junction temperature +150C Storage ambient temperature range Y = Last Digit of Year Sealed WW = Week Sealed L = Lot Number C = Country of Origin* A = Assembler ID* = "Green" Packaging *May be part of top marking Package may or may not include the following marks: Si or 16-Lead SOIC (NG) Typical Thermal Resistance -65C to +150C Continuous power dissipation (TA = +25C) LLLLLLLL 1000mW Package ja 16-Lead SOIC 83OC/W Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (The * denotes the specifications which apply over the full operating ambient temperature range of -40OC < TA < +125OC, otherwise the specifications are at TA = 25OC. VIN = 24V, CPVDD = 1.0F, CAVDD = 1.0F, CGT = 1.0nF, CRT = 1.0nF, CDIS = 330pF unless otherwise noted.) Sym Description Min Typ Max Unit Conditions Input VINDC Input DC supply voltage range - 9.0 - 40 V DC input voltage IINSD Shut-down mode supply current - - - 1.5 mA PWMD = GND Internally regulated voltage - 9.5 10 10.5 V VIN = 12 - 40V, fS = 500kHz, PWMD = VDD UVLORISE VDD under voltage lockout threshold * 6.65 - 7.20 V PVDD rising UVLOHYST VDD under voltage hysteresis - - 500 - mV PVDD falling Minimum VDD voltage * 8.0 - - V Internal Regulator for Gate Drivers PVDD PVDD,MIN Doc.# DSFP-HV9964 A100112 2 VIN = 9.0V, PWMD = VDD, fS = 500kHz, CGT = 2.0nF Supertex inc. www.supertex.com HV9964 Electrical Characteristics (cont.) (The * denotes the specifications which apply over the full operating ambient temperature range of -40OC < TA < +125OC, otherwise the specifications are at TA = 25OC. VIN = 24V, CPVDD = 1.0F, CAVDD = 1.0F, CGT = 1.0nF, CRT = 1.0nF, CDIS = 330pF unless otherwise noted.) Sym Description Min Typ Max Unit Conditions Internal Low Voltage Regulator AVDD IAVDD_ext Internally regulated voltage * 4.9 5.0 5.1 V VIN = 9 - 40V, PWMD = VDD External current draw - 0 - 500 A --- PWM Dimming VPWMD(lo) PWMD input low voltage * - - 0.8 V --- VPWMD(hi) PWMD input high voltage * 2.0 - - V --- Latching delay time - - 100 - ns --- PWMD pull down resistor - 50 100 150 k VPWMD = 3.3V Short circuit current, sourcing - 0.25 - - A VGT = 0V ISINK Sinking current - 0.50 - - A VGT = 10V TRISE Output rise time - - 34 - ns PVDD = 10V TFALL Output fall time - - 13 - ns PVDD = 10V td RPWMD GT Output ISOURCE Over Voltage Protection VOVP,rising Over voltage rising trip point * 1.94 2.00 2.06 V OVP rising VOVP,HYST Over voltage hysteresis - - 0.20 - V OVP falling Hiccup Timer CHCP = 10nF - 100nF; 10A current @ 100kHz switching frequency CHCP = 10nF - 100nF; 15A current @ 100kHz switching frequency KHCP+ Multiplier for charging current - - 0.50 - - KHCP- Multiplier for discharging current - - 0.75 - - VFC Voltage level to start gate driver - - 1.8 - V --- VDLY Voltage level for open loop detection - - 2.0 - V --- VRST Voltage level restart HCP timer - - 0.1 - V --- IDIS Discharging current (pull down FET) - 10 - - mA KSS+ Multiplier for charging current - - 0.5 - - ISS- Discharging current - 1.0 - - mA Soft Start VTMR = 5.0V CSS = 1nF - 10nF; 10A current @ 100kHz switching frequency VSS = 5.0V Note: # Denotes specifications guaranteed by design Doc.# DSFP-HV9964 A100112 3 Supertex inc. www.supertex.com HV9964 Electrical Characteristics (cont.) ((The * denotes the specifications which apply over the full operating ambient temperature range of -40OC < TA < +125OC, otherwise the specifications are at TA = 25OC. VIN = 24V, CPVDD = 1.0F, CAVDD = 1.0F, CGT = 1.0nF, CRT = 1.0nF, CDIS = 330pF unless otherwise noted.) Sym Description Min Typ Max Unit Conditions Slope Compensation ISLOPE TSETTLING Peak current out of CS pin - 150 180 216 A --- Settling time for current sourced - - - 800 ns --- * 100 - 250 ns --- - - - 200 ns COMP = AVDD, 50mV overdrive at CS # - 1/12 - - --- - -10 - +10 mV --75pF capacitance at COMP pin Current Sense TBLANK TDELAY1 Rdiv VOFFSET Leading edge blanking Delay to output of output comparator Internal resistor divider ratio - COMP to CS Comparator offset voltage Internal Transconductance Opamp GB Gain-bandwidth product # - 1.0 - MHz AV Open loop DC gain - 65 - - dB Output open Input common-mode range # -0.3 - 3.0 V --- Output voltage range # 0.7 - AVDD -0.7 V AV > 50dB Gm Transconductance - - 1.5 - mA/V --- VOFFSET Input offset voltage * -3.0 - 3.0 mV --- ICOMP+ COMP sink current # - 0.2 - mA VFB = AVDD, VIREF = 0, VCOMP = 0 ICOMP- COMP source current # - 0.2 - mA VFB = 0V, VIREF = AVDD, VCOMP = AVDD -0.7V Input bias current # - 0.5 1.0 nA --- Discharging current - 10 - - mA VCOMP = 5.0V fOSC1 Oscillator frequency * 88 100 112 kHz RT = 193k fOSC2 Oscillator frequency * 440 500 560 kHz RT = 39k FOSC Output frequency range # 88 - 560 kHz --- DMAX Maximum duty cycle * 87 - 93 % --- VCM VCOMP IBIAS ICOMP,DIS Oscillator Note: # Denotes specifications guaranteed by design Doc.# DSFP-HV9964 A100112 4 Supertex inc. www.supertex.com HV9964 Electrical Characteristics (cont.) (The * denotes the specifications which apply over the full operating ambient temperature range of -40OC < TA < +125OC, otherwise the specifications are at TA = 25OC. VIN = 24V, CPVDD = 1.0F, CAVDD = 1.0F, CGT = 1.0nF, CRT = 1.0nF, CDIS = 330pF unless otherwise noted.) Sym Description Min Typ Max Unit Conditions Output Short Circuit GSC Gain for short circuit comparator - 1.8 2.0 2.2 - --- VOMIN Minimum output voltage of the gain stage * 0.14 0.20 0.26 V IREF = GND TOFF Propagation time for short circuit detection - - - 250 ns PWMD = VDD, IREF = 400mV; FB step from 0 to 900mV; FLT goes from high to low; no capacitance at DIS pin TRISE,DIS DIS output rise time - - - 100 ns 330pF capacitance at DIS pin TFALL,DIS DIS output fall time - - - 100 ns 330pF capacitance at DIS pin TBLANK,SC Blanking time * 500 - 700 ns --- - 0 - 0.3 V IFLT = 1.0mA FB threshold voltage - 85 - 115 mV --- COMP threshold voltage - AVDD -0.3 - - V --- Fault Monitor VFLT(LOW) FLT low voltage Open Loop Detection VFB(TH) VCOMP (TH) Doc.# DSFP-HV9964 A100112 5 Supertex inc. www.supertex.com HV9964 Functional Block Diagram PVDD Linear Regulator TOFF_MIN + 7.0V/6.5V AVDD LPF Td POR + 4.5V/4.0V REF - DIM Q S VCLK KHCP*IRT IRT + RST Clock Q DIM_L + TBLANK CS - DIM_B 11R REF DIM_L S Q R Q DIM HCP + FC - 1.8V OL - R 0.1V - DLY + K*VCLK PWMD FC FC TOFF_MIN RT DIS DP Block DIM LPF GND DIM_B TOFF_MIN Linear Regulator VIN GT 2.0V KHCP*IRT R FLT FLT COMP + KSS*IRT REF-0.3V FC 0.1V SS OL DIM DIM DIM + - 2 S Q R Q + POR S Q DIM R Q DIM LPF IREF DLY DLY FC Doc.# DSFP-HV9964 A100112 - Dimming + - min RST S Q R Q FLT OVP 2.0V/1.8V FB 6 Supertex inc. www.supertex.com HV9964 Power Topology PWM Dimming The HV9964 is a switch-mode LED driver designed to control a boost or SEPIC converter in a constant frequency mode. The IC includes internal linear regulators, which enables it to operate at input voltages from 9 to 40V. The IC includes features typically required in LED drivers like open LED protection, output short circuit protection, linear and PWM dimming, and accurate control of the LED current. It also includes logic to enable enhanced PWM dimming which allows dimming ratios in excess of 10,000:1. PWM dimming in the HV9964 can be accomplished using a TTL compatible square wave source at the PWMD pin. The HV9964 has an enhanced PWM dimming capability, which allows PWM dimming to widths a few hundred nanoseconds with no drop in the LED current. The enhanced PWM dimming performance of the HV9964 can be best explained by considering typical boost converter circuits without this functionality. When the PWM dimming pulse becomes very short, the boost converter is turned off before the input current can reach its steady state value. This causes the input power to drop, which is manifested in the output as a drop in the LED current (Figure. 1b; for a CCM design). Power Supply to the IC (VIN, PVDD and AVDD) The HV9964 can be powered directly from its VIN pin that takes a voltage up to 40V. There are two linear regulators within the HV9964 - a 10V linear regulator (PVDD), which is used for the two FET drivers, and a 5.0V linear regulator (AVDD) which supplies power to the rest of the control logic. The IC also has a built in under-voltage lockout which shuts off the IC if the voltage at either VDD pin falls below its UVLO threshold. Both VDD pins must by bypassed by a low ESR capacitor (0.1F) for proper operation. The input current drawn from the external power supply (or VIN pin) is a sum of the 1.5mA (max) current drawn by the all the internal circuitry and the current drawn by the gate driver (which in turn depends on the switching frequency and the gate charge of the external FET). PWMD IINDUCTOR ILED IINDUCTOR IL(SS) In Figures 1a and 1b, IO(SS) and IL(SS) refer to the steady state values (PWMD = 100%) for the output current and inductor current respectively. As it can be seen, the inductor current does not rise high enough to trip the CS comparator. This causes the closed loop amplifier to lose control over the LED current, and the COMP output rails to VDD. The switching frequency of the converter is set by connecting a resistor between RT and GND. The resistor value can be determined as: In the HV9964, however, this problem is overcome by keeping the boost converter running even though the PWMD pulse has ended. This is to ensure enough power delivered to the output. Thus, the amplifier still has control over the LED current, and the LED current is in regulation as shown in Figure 2. + 880 The oscillator is also timed to the PWM dimming signal to improve the PWM dimming performance. The oscillator is turned off when PWMD is low and is enabled when PWMD goes high. Doc.# DSFP-HV9964 A100112 IO(SS) Figure 1b: Sub-TS PWM dimming width Timing Resistor (RT) fS * 52pF IL(SS) PWMD In the above equation, fS is the switching frequency of the converter, fPWMD is the frequency of the applied PWM dimming signal, QG1 is the gate charge of the external boost FET and QG2 is the gate charge of the load switch (both of which can be obtained from the FET datasheets). The AVDD pin can also be used as a reference voltage to set the LED current using a resistor divider to the IREF pin. 1 TS Figure 1a: PWM dimming width much greater than switching period TS IIN = 1.5mA + QG1 * fS + QG2 * fPWMD RT IO(SS) ILED 7 Supertex inc. www.supertex.com HV9964 Current Sense (CS) PWMD The current sense input is used to sense the source current of the switching FET. The CS input of the HV9964 includes a built in 100ns (minimum) blanking time to prevent spurious turn off due to the initial current spike when the FET turns on. The IC includes an internal resistor divider network, which steps down the voltage at the COMP pins by a factor of 12 (11R:1R). This voltage is used as the reference for the current sense comparators. Since the maximum voltage of the COMP pin is AVDD - 0.7V, this voltage determines the maximum reference current for the current sense comparator and thus the maximum inductor current. The current sense resistor RCS should be chosen so that the input inductor current is limited to below the saturation current level of the input inductor. For discontinuous conduction mode of operation, no slope compensation is necessary. In this case, the current sense resistor is chosen as: IO(SS) ILED IL(SS) IINDUCTOR Figure 2: Sub-TS PWM dimming width with the HV9964 Note that the GT output is not limited by its maximum duty cycle DMAX past the PWMD signal trailing edge. The gate is kept active until the corresponding CS reference is met by IINDUCTOR. When the PWMD signal is high, the GT and DIS pins are enabled, and the output of the transconductance op-amp is connected to the external compensation network. Thus, the internal amplifier controls the output current. When the PWMD signal goes low, the output of the transconductance amplifier is disconnected from the compensation network. Thus, the integrating capacitor maintains the voltage across itself. The DIS pin goes low, turning off the disconnect switch. However, the GT output is kept active. RCS = Pulse 1 Slope Compensation Choosing a slope compensation that is one half of the down slope of the inductor current ensures that the converter will be stable for all duty cycles. The HV9964 slope compensation circuit uses an external resistor RSC at CS pin to program the voltage slew rate. The current sourced out of the CS pin is proportional to the internal oscillator ramp. This current ramp has a peak value of 180A. Therefore, the slope compensation ramp is programmed as: Pulse 2 LED Current DS = 200ns/div dVCS dt = RSC * 180A * fS where fS is switching frequency. Assuming a down slope of DS (A/s) for the inductor current, the current sense resistor can be computed as: Figure 3: Deep PWM dimming performance: LED current maintained in regulation Doc.# DSFP-HV9964 A100112 12 * ISAT where ISAT is the maximum desired peak inductor current. For continuous conduction mode converters operating in the constant frequency mode, slope compensation becomes necessary to ensure stability of the peak current mode controller, if the operating duty cycle is greater than 0.5. This factor must also be accounted for when determining RCS (see Slope Compensation section). Note that disconnecting the LED load during PWM dimming causes the energy stored in the inductor to be dumped into the output capacitor. The chosen filter capacitor should be large enough so that it can absorb the inductor energy without significant change of the voltage across it. If the capacitor voltage change is significant, it would cause a turn-on spike in the inductor current when PWMD becomes high again. PWMD Input AVDD - 0.7V RCS = 8 AVDD - 0.7V 12 * 1 DS + I SAT 2fS Supertex inc. www.supertex.com HV9964 disappeared, the capacitor at the HCP pin is released and is charged slowly by a current source proportional to the RT current. The HCP timing capacitor is programmed as: The slope compensation resistor is chosen to provide the required amount of slope compensation required to maintain stability. RSC = DS CHCP fS * 180A Soft Start tHICCUP RT Once the capacitor is charged to 1.8V, the COMP and SS pins are released and GT and DIS pins are allowed to turn on. The HV9964 resumes operation, beginning with the softstart mode ensuring smooth recovery of the LED current. Soft start of the LED current can be achieved by connecting a capacitor at the SS pin. The rate of voltage rise of SS pin limits the LED current's rate of rise. Upon start-up, the capacitance at the COMP network is being charged by the 200A sourcing current of the transconductance amplifier. Without the soft-start function, this larger current would cause the COMP voltage to increase faster than the boost converter's response time, causing overshoots in the LED current during start-up. The SS pin is used to prevent these LED current overshoots by limiting the COMP voltage slew rate. A capacitor at the soft start pin programs this slew rate. Short Circuit Protection The HV9964 includes a latch which clamps the SS pin to ground, but releases it upon the first PWMD rising edge after power-on. This ensures soft start for the LED current independent of the power sequencing between VIN and PWMD. When a short circuit condition is detected (output current becomes higher than twice the steady state current), the gate and DIS outputs are pulled low. As soon as the load switch is turned off, the output current goes to zero and the short circuit condition disappears. At this time, the hiccup timer is started. Once the timing is complete, the converter attempts to restart. If the fault condition still persists, the converter shuts down and goes through the cycle again. If the fault condition is cleared (due to a momentary output short) the converter will start regulating the output current normally. This behavior of the HV9964 allows the LED driver to recover from accidental shorts without having to power the IC down. Note that the power rating of the LED current sense resistor has to be chosen adequately to be able to survive a persistent fault condition. DIS Output The power rating of the resistor can be determined using: dVSS dt = 2V CSS * RT The DIS pin is used to control a load switch when driving boost and SEPIC converters. In the case of boost converters, when there is a short circuit fault at the output, there is a direct path from the input source to ground which can cause high currents to flow. The load switch is used to interrupt this path and prevent damage to the converter. The load switch also helps to disconnect the output filter capacitors for the boost and SEPIC converters from the LED load during PWM dimming and enables a fast dimming transitions. PRS RT = ISAT2RS * 0.95s RT where ISAT is the saturation current of the disconnect FET. Open Loop Detection The HV9964 includes protection circuitry disabling the boost converter when there is a short circuit between the anode and cathode of the LED string. However, if the string is shorted to ground, the sense resistor RS is bypassed, causing the IC to lose the feedback signal. The voltage at FB becomes 0V, and COMP rails to the AVDD potential. Nevertheless, the boost converter keeps on running, producing a potentially damaging LED current. Fault Conditions and Hiccup Timer The HV9964 is a robust controller which can protect the LEDs and the LED driver in case of fault conditions. The HV9964 includes both open LED protection and output short circuit protection. In both cases, the HV9964 shuts down and attempts a restart. The hiccup time is programmed by the capacitor at the HCP pin. When a fault condition is detected, both GT and DIS outputs are disabled. The COMP, SS and HCP pins are pulled to GND. Once the voltage at the HCP pin falls below 0.1V, and the fault condition(s) have Doc.# DSFP-HV9964 A100112 ISAT2RS (TBLANK,CS + TOFF) To detect and to prevent this type of a fault, an open loop detection circuit is added. If COMP > AVDD - 0.3V, and FB < 0.1V simultaneously, then a discharge current of 15A is activated at 9 Supertex inc. www.supertex.com HV9964 the HCP pin. With a 10A sourcing current and a 15A sinking current, the total current discharging the HCP capacitor is 5A. This current will discharge the HCP capacitor from AVDD to 2.0V. When the voltage at HCP drops below 2.0V, the IC interprets it as an open loop condition, issues a logic low state at the FLT output, and shuts GT and DIS down. The discharge time provides a programmable delay to the detection event. This delay time is needed because the open loop condition may happen during startup when the SS capacitance is insufficient. To prevent misinterpretation of this condition as the current loop open, the delay is introduced. FLT Output COMP Output FB Input LED Current 500s/div It is recommended, that the input supply voltage is shut off by the host upon issuing FLT low, as shutting the HV9964 off may not necessarily interrupt the current in the LED string in the case of a partial short circuit to chassis. Doc.# DSFP-HV9964 A100112 Short to GND Figure 8: Wiring short circuit to GND: detection and shutdown. 10 Supertex inc. www.supertex.com HV9964 Pin Description (16-Lead SOIC) Pin # Name Description 1 AVDD This is a power supply pin for all internal control circuits. This voltage is also used as the reference voltage both internally and externally. It must be bypassed with a low ESR capacitor to GND (at least 0.1F). 2 VIN This pin is the input of a 40V high voltage regulator. 3 DIS This pin is used to drive an external load switch which disconnects the load from the circuit during a fault condition or during PWM dimming to achieve a very high dimming ratio. 4 PVDD 5 GT 6 GND Ground return for all the low power analog internal circuitry as well as the gate drivers. This pin must be connected to the return path from the input. 7 CS This pin is used to sense the source current of the external power FET. It includes a built-in 100ns (min) blanking time. 8 RT This pin sets the frequency of the power circuit. A resistor between RT and GND will program the circuit in constant frequency mode. The switching frequency is synchronized to the PWMD input and oscillator will turn on once PWMD goes high. This pin must be bypassed to AVDD using a 1.0nF capacitor. 9 SS This pin is used to provide soft start upon turn-on of the IC. A capacitor at this pin programs the soft start time. 10 COMP Stable Closed loop control can be accomplished by connecting a compensation network between COMP and GND. 11 IREF The voltage at this pin sets the output current level. The current reference can be set using a resistor divider from the AVDD pin. Connecting a voltage greater than 1.25V at this pin will disable the short circuit comparator. 12 FB 13 PWMD When this pin is pulled to GND (or left open), switching of the HV9964 is disabled. When an external TTL high level is applied to it, switching will resume. 14 OVP This pin provides the over voltage protection for the converter. When the voltage at this pin exceeds 1.25V, the gate output of the HV9964 is turned off and DIS goes low. The IC will turn on when the voltage at the pin goes below 1.125V. 15 HCP This pin provides the hiccup timer in case of a fault. A capacitor at this pin programs the hiccup time. 16 FLT This open-drain, active-low output indicates the presence of a fault condition. Doc.# DSFP-HV9964 A100112 This pin is a regulated 10V supply for the two gate drivers (DIS and GT). It must be bypassed with a low ESR capacitor to GND (at least 1.0F). This is the gate driver output for the switching FET. This pin provides output current feedback to the HV9964 by using a current sense resistor. 11 Supertex inc. www.supertex.com HV9964 16-Lead SOIC (Narrow Body) Package Outline (NG) 9.90x3.90mm body, 1.75mm height (max), 1.27mm pitch D 1 16 Note 1 (Index Area D/2 x E1/2) E1 E Gauge Plane L2 1 e L1 b Top View L Seating Plane View B View B A h h A A2 Seating Plane A1 Side View View A-A A Note: 1. This chamfer feature is optional. If it is not present, then a Pin 1 identifier must be located in the index area indicated. The Pin 1 identifier can be: a molded mark/identifier; an embedded metal marker; or a printed indicator. Symbol Dimension (mm) A A1 A2 b D E E1 MIN 1.35* 0.10 1.25 0.31 9.80* 5.80* 3.80* NOM - - - - 9.90 6.00 MAX 1.75 0.25 1.65* 0.51 3.90 10.00* 6.20* 4.00* e 1.27 BSC h L 0.25 0.40 - - 0.50 1.27 L1 L2 1.04 0.25 REF BSC 1 0O 5O - - 8O 15O JEDEC Registration MS-012, Variation AC, Issue E, Sept. 2005. * This dimension is not specified in the JEDEC drawing. Drawings are not to scale. Supertex Doc. #: DSPD-16SONG, Version G041309. (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to http://www.supertex.com/packaging.html.) Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate "product liability indemnification insurance agreement." Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com) Supertex inc. (c)2012 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSFP-HV9964 A100112 12 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Supertex: HV9964NG-G M934 HV9964NG-G