AA1700 Description
Soft start and short circuit protection setting Power supply pin ON/OFF control pin Output driver pin Ground pin Internal PWM frequency setting pin Error amplifier output pin BLOCK DIAGRAM Vcc 3 CLK 7 Regulator 0.5V 0.1V Error Amp. + + P0 IN 1 Output driver ER 8 0.6V Soft start short circuit protection 6 GND 2 SP 4 CTL ©Copyright Agamem Microelectronics Inc. 2 .agamem..tw 2007/1/22.
AA1700 Key Features
- Drives Up to 8 LEDs in Series
- Second or more string of LEDs can be added
- Low current consumption: Typically 5.5 mA in operation, 1 µA or less in stand-by
- PWM mode operation of the boost circuit (frequency range: 10 kHz to 1 MHz)
- Incorporates a soft start circuit and adjustable soft start time
- Timer latch LED short-circuit protection circuit (SP)
- On/off control function
- Available in an 8-pin TSSOP or SOP package