WLED Linear Driver for Li-lon Battery Application - ACE Technology
Description
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ACE517
Technology Description
WLED Linear Driver for Li-lon Battery Application
The ACE517 is a CMOS based White/Blue LED driver with stand-alone capability.
The driver is primarily designed for LED backlighting of LCE display powered by Li-ion battery with its high efficiency, low standby current and wide range of input supply voltage, the ACE517 is suitable for applications such as portable device display and keypad backlighting.
In portable application, three or four-channel LED solutions are popular, ACE517 has three LED channels with a SOT-23-6 package.
ACE517 has four LED channels with a MSOP-8 package.
Features
• • • • • • • • • •
No external component required PWM dimming control available Low noise and EMI LED sink current of 20mA Independent current sink circuit for each LED output Versatile supply voltage range Low standby current High accuracy current match on each channel
Application
Small Size Color LEC Backlights Driver Mobile Phone, Portable Device Keypad Backlights Driver
Absolute Maximum Ratings
Parameter Supply voltage Voltage of LEDn, EN pin Maximum Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Max Unit -0.
3 to 7 V -0.
3 to 7 V O 125 C O -40 to 85 C -40 to 150 OC
VER 1.
2
1
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ACE517
Technology Packaging Type
SOT-23-6
6 5 4
WLED Linear Driver for Li-lon Battery Application
MSOP-8
8 7 6 5
1
2
3
1
2 3
4
Pin Vin Vss EN LED1 LED2 LED3 LED4 GND
SOT-23-6 MSOP-8 1 3 2 1.
4 3 6 5 4 2 8 7 6 5
Function Power Supply Chip enable pin.
High level activates the chip.
Connect the pin to Vcc if not used, do not leave this pin floating RGB or WLED cathode connection pin Analog ground.
In ACE517, ...
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