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AP2502

BCD
Part Number AP2502
Manufacturer BCD
Published Aug 16, 2015
Description 4-CH Linear Constant Current Sink
Detailed Description Data Sheet 4-CH Linear Constant Current Sink With Matching AP2502 General Description The AP2502 is a 4-channel indep...
Datasheet PDF File AP2502 PDF File

AP2502
AP2502


Overview
Data Sheet 4-CH Linear Constant Current Sink With Matching AP2502 General Description The AP2502 is a 4-channel independent linear current sink with low dropout voltage and perfect match between each channel.
Each channel can provide 20mA continuous constant current.
In application, there is only one 0.
1µF ceramic capacitor required, and there is no any EMI and switching noise issue.
It is perfect choice for hand-hold portable system especially based on Li-ion/Polymer battery powered display module.
The brightness can be controlled and/or adjustable via simple PWM signal applied to EN pin.
The AP2502 is available with SOT-23-6 and TSOT-23-6 packages.
Features • Current Matching Between Each Channel: ±1% • Low Dropout Voltage: 65mV (Typ.
) @ ILED= 20mA • Maximum Output Current on Each Channel: 20mA • Ultra-low Quiescent Current: 125µA (Typ.
) • Ultra-low Shutdown Current: 1µA (Max.
) • None EMI and Switching Noise Issue • Permitted PWM Dimming Frequency up to • 150kHz • OTSD Protection Applications • Mobile Phone, Smart Phone, PDA • MP3, MP4, PMP • Small Size Backlight Module SOT-23-6 TSOT-23-6 Figure 1.
Package Types of AP2502 Oct.
2010 Rev 1.
1 BCD Semiconductor Manufacturing Limited 1 4-CH Linear Constant Current Sink With Matching Pin Configuration K/KT Package (SOT-23-6/TSOT-23-6) Data Sheet AP2502 Figure 2.
Pin Configuration of AP2502 (Top View) Pin Descriptions P in Number 1 2 Pin Name EN GND Description Chip enable pin, active high to permit PWM signal input for brightness control by changing duty cycle GND 3, 4, 5, 6 LED4 to LED1 LED cathode terminal for channel number Oct.
2010 Rev 1.
1 BCD Semiconductor Manufacturing Limited 2 4-CH Linear Constant Current Sink With Matching Functional Block Diagram Data Sheet AP2502 Oct.
2010 Rev 1.
1 Figure 3.
Functional Block Diagram of AP2502 BCD Semiconductor Manufacturing Limited 3 4-CH Linear Constant Current Sink With Matching Ordering Information AP2502 - Data Sheet AP2502 Circuit Type G...


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