HA17451P/FP PWM Control Dual Switching Regulator IC Description The HAI7451 is a PWM control IC containing the same two basic circuits for switching regulator. The two basic circuit is able to realize the perfect synchronous operation to common oscillator fre- quency. So this IC has two output switches and is designed to be incorporated in Step-Up and Step-Down and Voltage Inverting applications. The operation range versus input is wide, 3 ~ 40V. So the HAI7451 is suitable for DC-to-DC converters, using the batteries. Features * Internal low drop out voltage regulator circuit (Vout = 2.5V, Vdrop = 0.2V typ.) * Wide range of operating supply voltage 3V ~ 40V * Large maximum output current..... 50mA (max.) * Internal under voltage lockout protection circuit High threshold voltage ............. 2.8V (typ.) Low threshold voltage .............. 2.6V (typ.) Internal timer latch short protection circuit * Low power dissipation ............ 1.5mA (typ.) Wide range of operating oscillation frequency fose = IKHz ~ S500KHz * Wide dead band range (D.B. duty 0 ~ 100%) e Small surface mount package (SOP: smail outline package) for high density PCB Functions * Low drop out 2.5V reference voltage circuit Under voltage lockout protection circuit * Timer latch short protection circuit * Triangular waveform oscillation circuit HA17451P ot (DP-16) HA17451FP (FP-16D) Pin Arrangement c[1 | 16] Vref OQ 6 Ry [2 | 15] S.C.P NON. INV [a Fa] NON. INV INPUT 4 INPUT? INV. 4 13] INV. INPUT" [s INPUT2 FEED 7p] FEED BACK! Ls 2] BACK2 pr.c1 [6 11] DT. c2 out [7 | 10| oUT2 eno [a | (Top View) Pin Functions Pin No. Symbois Functions 1 CT Timing Capacitor Dead time control circuit 2 RT Timing Registor Error amplifier circuit 3, 14 Non. Inv. Input Non invert input of error amp. Output driver circuit 4,13 Inv. Input Invert input of error amp. PWM comparator circuit 5, 12 Feed Back Output of error amp. . . 6, 11 D.T.C. Dead time control Ordering Information 710 OUT Output 8 GND Ground Type No. Package 9 Vcc Input voltage HA17451P DP-16 15 S.C.P. Short circuit protection HA17451FP FP-16D 16 Vret Reference voitage output HITACHI Hitachi America, Ltd. Hitachi Plaza * 2000 Sierra Point Pkwy. Brisbane, CA 94005-1819 (415) 589-8300 315HA17451P/FP Block Diagram Voc Cy Ry Reference Triangle PWM vet (6 Voltage Oscillator comparator 1 NON. inv. INPUT! (3}-]? INV. INPUT! G45 Short Circuit Error Amp Protection Cutput3 FEED BACK1 (5) Comparator ; FEED BACK2 Ou 7 PWM Error Amp2 NON. INV. INPUT2 (4) INV. INPUT2 (13) comparator? i >) OUT 1 T 4 <P OUT 2 $.C.P 63} oR UVLO 1 Output 2 Latch DEAD DEAD GND TIME TIME CONTROL 1 CONTROL 2 Absolute Maximum Ratings (Ta = 25C) Tj (max.) = 6 - a * Pc (max.) + Ta Item Symboi Rating Unit Note (0j - a is thermal resistance value during mounting. Power Supply Voltage voc 40 V and Pc (max.) maximum value of IC power dissipa- Error Amp. Input Voltage Vi 20 Vv tion.) . . Collector Output Voltage VO 40 Vv Therefore, to keep Tj (max.) = 125C, wiring Collector Output Current 10 50 mA density and board material must be selected accord- Power Dissipation Pr 680 mW 4 ing to the board thermal conductivity ratio shown Operation Top = -20~ +85 C below. Temperature Range Be careful that the value of Pc (max.) does not exceed Storage Tstg 55~ 4125 C that of PT. Temperature Range The absolute maximum ratings are limiting values, to be applied individually, beyond which the device may be permanently damaged. Functional operation under any of these conditions is not guaranteed. Exposing a circuit to its absolute maximum rating for extended periods of time may affect the device's reliability. Note: 1. In HA17451P a value of Ta < 45C is permissible. If more than 8.3mW/C derating must be performed. In HA17451FP allowable junction temperature of IC, Tj (max.), is shown below. 240 220 200 190 SOP16 without compound 160 140 PS 120 ESOP 16 I co | _-uSiNg paste | PL] containing compound | 80 I [ | oI os t 2 5 10 20 Board 40 mm 0.8t ceramic or 1.5t epoxy C 1. Glass epoxy board with wiring density of 10% 2. Glass epoxy board with wiring density of 30% 3. Alumina ceramic board with wiring density of 96% 316 Figure 1. Thermal resistance of SOP @ HITACHI Hitachi America, Ltd. Hitachi Plaza * 2000 Sierra Point Pkwy. Brisbane, CA 94005-1819 (415) 589-8300HA17451P/FP Electrical Characteristics (Ta = 25C, VCC = 6V, fosc = 200KHz) Spec Item Symbol Test Condition min. typ. max. Unit (1) Reference Section Output Voltage Vret lo = 1mA 2.40 2.50 2.60 v Voltage Drop Vdrop lo = 1mA _ 0.2 0.5 Vv Line Regulation Line Voc = 3.0 ~ 40V _ 2 12.5 mv Load Regulation Load 1o = 0.1 ~ 1mA _ 1 75 mV Temperature Stability Arc Ta = =20 ~ 28C O. % Rice Ta = 25 ~ 85C -0.1 _ Short Circuit Current los Vret = OV 3 10 30 mA (2) Under Voltage Lockout Protection Section High Level Threshold Vth lo = 0.1mA _ 2.8 _ Vv Low Level Threshold Vu lo = 0.1mA 2.6 - v Hysterisis Width VHYS lo = 0.1mA 140 200 _ mv Reset Voltage VR lo = 0.tmA 1.5 1.9 - Vv (3) Protection Section Input Threshold VTPC 0.65 0.7 0.75 Vv Input Standby Voltage VSTBY No Pull Up 140 185 230 mV Input Latch Voltage VI No Pull Up _ 60 120 mv Input Source Current Ibpe 10 15 20 uA Comparator Threshold Voltage Vie 5 pin, 42 pin _ 1.18 _ Vv {4) Oscillator Section = F, Frequency fose a _ ee - 200 _ KHz Initial Accuracy fdev 10 % Voltage Stability fav _ 1 _ % . faT1 Ta = -20 ~ 25C _ -0.4 _ Temperature Stability % faT2 Ta = 25 ~ 85C _ -0.2 _ (5) Dead Time Control Section Input Bias Current Ibat 1 BA Latch Mode Source Current lat 80 145 _ BA Latch Input Voitage Vat 2.3 _ v Input Threshold Voltage Vito Duty Cycle = o% 205 225 V Input Threshold Voltage Vitoo uty Cycle = 100% 1.20 1.45 v (6) Error Amp Section Input Offset Voltage VIO Vo (5, 12 Pin) = 1.25V -6 6 mV input Offset Current ho Vo (5, 12 Pin) = 1.25V -100 100 nA Input Bias Current IB Vo (5, 12 Pin) = 1.25V _ 160 500 nA Voltage Rane Input VCR Voc = 3 ~ 40V 1.0 1.45 Vv Open Loop Gain AV RNF 200KQ 70 80 _ dB Band Width GB _ 1.5 - MHz Rejection woce CMRR 60 80 _ dB Maximum Output Voltage VOM + Vref 01 = Vom- _ _ 1.0 Output Sink Current loM+ Vo = 1.25V 0.8 41.6 _ mA Output Source Current lom- Vo = 1.25V -45 -70 _ nA HITACHI Hitachi America, Ltd. * Hitachi Plaza 2000 Sierra Point Pkwy. Brisbane, CA 94005-1819 (415) 589-8300 317HA17451P/FP Electrical Characteristics (Ta = 25C, VCC = 6V, fosc = 200KHz) (Contd.) Spec Item Symbol Test Condition min. typ. max. Unit (7) Output Section Collector Off-State Current (1) ILeak(1) Vo = 40V _ 10 pA Vo = 40V Collector Off-State Current (2) ILeak(2) Voc = Open - _ 10 pA Saturation Voltage Vsat lo = 10mA 1.2 2 Vv Short Current loss Vo = 6V _ 120 _ mA (8) PWM Comparator Section fosc = 10KHz Input Threshold Voltage Vito Duty Cycle = 0% 2.05 2.25 Vv fose = 10KHz . 1.4: _ Vv Input Threshold Voltage Vi100 Duty Cycle = 100% 4.20 5 Input Sink Current Isink Vo (5, 12 Pin} = 1.25V 0.5 1.6 _ mA Input Source Current lsource Vo (5, 12 Pin) = 1.25V 45 -70 ~ pA (9) Total Current Section Standby Current lecs Output Off-State _ 1.5 2.0 mA Average Supply Current leca RT = 10K =_ 1.9 2.6 mA Measurement Circuit O0.1pF = Cy 330pF Ls Ry 10k L@) YH 0 SW; T Coe @) sib re Voc RLY RL I Oo Oo OUT2 out HITACHI 318 Hitachi America, Ltd. Hitachi Plaza 2000 Sierra Point Pkwy. Brisbane, CA 94005-1819 (415) 589-8300HA17451P/FP Waveform Timing Triangular waveform Error amp output Dead time input voltage x ___.. ey 4 Vv Reference output a : iH oe 128 1 UNV.L operating 1 ' ' \ 1 1 Wy GCutput collector waveform | | { \ L ' ' 1 - tee - eee eee eee eee ee eee ee ee eee Lgette eet eg tteeee. 0.7V Protection enable waveform oo at ov S.C.P comparator output U.V.L high level threshold J. YCCMiN 3V 2 8Viyp Supply voltage ov Protection Enable Time, tp = 0.051 x 10. Cpe Sec) @ HITACHI Hitachi America, Ltd. Hitachi Plaza 2000 Sierra Point Pkwy. # Brisbane, CA 94005-1819 (415) 589-8300 319HA17451P/FP System Configuration Step up output Step down output oO Ce 1000p Vee 9 100u-47 0 C4 Fig g s $ . Pr 3 o aay Shs 220K] 35K) gay VE, A 047p 50K fed 4 oe 35k [| Re pa Ra c HA | 1615 14 13 12 11 10 9 Cr HA17451P/FP a1 Ot 1234 5 6 Cy Ay [es ] 470P ay Rie 35K s Ais en oO en High Frequency Dual Switching Regulator System Solder Mounting Method 1) Small and light surface-mount packages require special attentions on solder mounting. On solder mounting, pre-heating before soldering is needed. The following figure shows an example of infrared rays reflow. 2) The difference of thermal expansion coefficient between mounted substrates and IC lead may cause a failure like solder peeling or solder wet, and electrical characterictics may change by thermal stress. Therefore, mounting should be done after sufficient confirmation for especially in case of ceramic substrates. 140-160C NS Temperature max = 60 second | 1-5C second =< 10 second max 235C le 1-4C second Time 9 (second) 320 An Example of Infrared Rays Reflow Conditions @ HITACHI Hitachi America, Ltd. Hitachi Plaza 2000 Sierra Point Pkwy. * Brisbane, CA 94005-1819 (415) 589-8300