3 Bit 12V LED Driver
CS8803
1 Rev. 1.1
Chiplus reserves the right to change product or specification without notice.
CS8803
3-Channel Constant-Current RGB LED Driver IC
Product Description
CS8803 is a 3-channel constant-current RGB LED driver IC, which is designed for LED
lighting or display applications. At CS8803 output channel, 3-channel constant current value set is
adjustable with three corresponding external resistors to match RGB color characteristics. CS8803
built in a voltage regulator, which provides supply voltage range form 5.0V to 12V, maintains
constant current from 5mA to 60mA. Control signal (ENBO, LTO), data (SDO) and clock (CKO)
buffer outputs are designed for cascading another chip. In addition, CS8803 guarantees to stand
maximum 24V at the output channel.
Features
3 constant current channels for RGB each
Maximum output current capability: 60mA each channel
Range of constant current for every channel: 5mA ~ 60mA
Built-in buffers for cascading control signal (ENBO, LTO), data (SDO) and clock (CKO)
to next driver IC
Built-in voltage regulator working with supply voltage ranging from 5V ~ 12V
Output current accuracy:
Between channels: < +/- 6% (max.), and
Between ICs : < +/- 6% (max.)
Maximum output drain voltage: 24V
For common anode LED application
CMOS/TTL compatible input
Applications
LED decorative lighting
Indoor/Outdoor LED video or message display
Landscape lighting
Neon lamp alternative
Product Family
CS8803BT ------- 20SSOP-150mil
3 Bit 12V LED Driver
CS8803
2 Rev. 1.1
Chiplus reserves the right to change product or specification without notice.
Pin Assignment
GNDA VDD
NC NC
REXT0 OUT0
REXT1 OUT1
REXT2 OUT2
ENB ENBO
LT LTO
CK CKO
SDI SDO
GNDD CAP
Block Diagram
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
CS8803
3 Bit 12V LED Driver
CS8803
3 Rev. 1.1
Chiplus reserves the right to change product or specification without notice.
Pin Description
Pin No. Pin Name Function
1 GNDA Analog ground
2 NC No used
3~5 REXT0~REXT2 Input terminal used to connect an external resistor for setting up output
current for all output channels
6 ENB Output enable input terminal
When ENB is active (low), the output ports are enabled; when ENB is inactive
(high), all output ports are turned off (blanked)
7 LT Data strobe input terminal
The data in shift register is transferred to the data latch when LT is high. The
data is latched when LT goes low
8 CK Clock input terminal for data shift on rising edge
9 SDI Serial data input terminal to the shift register
10 GNDD Digital ground
11 CAP Connected to a compensated capacitor for the regulator output
12 SDO Serial data output terminal to be connected to the SDI of the next driver IC.
SDO signal changes on falling edge of CK
13 CKO Clock output terminal, CK replica, connected to the next CK
14 LTO LT output terminal, LT replica, connected to the next LT
15 ENBO ENB output terminal, ENB replica, connected to the next ENB
16~18 OUT2~OUT0 Constant current output terminal
19 NC No used
20 VDD Supply voltage terminal
3 Bit 12V LED Driver
CS8803
4 Rev. 1.1
Chiplus reserves the right to change product or specification without notice.
Equivalent Circuits of I/O pins
ENB pin LT pin
CK, SDI pins SDO, ENBO, LTO, CKO pins
Maximum Ratings
Characteristic Symbol Rating Unit
Supply Voltage VDD +15 V
Input Voltage VIN -0.4~VDD+0.4 V
Output Current per Output Channel IOUT +60 mA
Sustaining Voltage at OUT port VDS 24.0 V
GND Terminal Current IGND 1000 mA
Power Dissipation at 25℃ PD 1.2 W
Thermal Resistance Rth(j-a) 73.43 ℃/W
Operating Junction Temperature Tj,max 150
℃
Operating Temperature Topr -40~+85
℃
Storage Temperature Tstg -55~+150 ℃
3 Bit 12V LED Driver
CS8803
5 Rev. 1.1
Chiplus reserves the right to change product or specification without notice.
Application Information
Application Circuit
Figure 4
Note
1. When the Rext is 590Ω, the IOUT is 20mA.
2. C1~C6 are required. The values of the C1/C4 and C3/C6 are for reference only. The value of C2/C5
ranges from 4.7μF/16V to 10μF/16V. Tantalum capacitors or capacitors with ESR<2Ω are recommended.
3. C7~C22 and R7~R22 can modify the signal waveforms.
Order information
Part No. Package Type Lead Pitch
CS8803BT 20SSOP(150mil) 0.64 mm
