APE1601 Datasheet, PDF (1/13 Pages) Advanced Power Electronics Corp. – White LED Driver (120mA Charge Pump with Current Source)

Advanced Power
Electronics Corp.
APE1601/A
White LED Driver (120mA Charge Pump with Current Source)
™ GENERAL DESCRIPTION
The APE1601 is a high efficiency charge pump white LED driver. It supports up to
4 white LEDs with regulated constant current for uniform intensity. The APE1601
maintains the highest efficiency by utilizing a x1/x1.5/x2 fractional charge pump and
low dropout current regulators.
User can easily configure each LED current up 30mA by an external resistor. Two
digital inputs can be programmable to control white LED On/Off. LED dimming can be
achieved by applying a PWM signal to the digital control signals. The operating voltage
range is 2.5V to 5.5V. Internal soft-start circuitry effectively reduces the in-rush current
both while start-up and mode change. APE1601 also provides comprehensive
protections such short circuit protection and over-temperature protection. The load is
disconnected from VIN while shutdown and the shutdown current is less than 1uA.
APE1601 is available in a QFN 3x3mm-16L package.
™ FEATURES
- Very High Efficiency Over 90% of Battery Life
- Support up to 4 WLEDs
- Support up to 120mA Output Current
- Soft Start / Short Circuit Protection Function
- Three Charge Pump Mode: x1, x1.5, x2
- 250k/1MHz Fixed Frequency Oscillator
- RoHS Compliant and 100% Lead (Pb)-Free
™ Block Diagram
C1P C1N C2P C2N
LED4 LED3 LED2 LED1
VOUT
VIN
PGND
EN
x1/x1.5/x2
Charge Pump
Mode Decision
250K/1MHz
Oscillation
Is
Current Brightness
and Setting
Control Circuit
Output
Selection Logic
Bandgap
Voltage
Current Set
Detect
AGND
ISET
CTRL0 CTRL1
This datasheet contains new product information. Advanced Power Electronics Corp. reserves the rights to modify the product specification without notice. No liability is
assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
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