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APW7584
Active
3MHz, 1A Synchronous Step-Down IR-LED Driver
Features
General Description
The APW7584 is a synchronous step-down IR-LED driver adopting constant on time control mode. Due to increasing the oscillation to high frequency, the mounting area including peripheral components can be reduced. APW7584 also has low switching quiescent current to improve efficiency and battery-powered equipment using time. The APW7584 is equipped with Power-on-reset, internal soft start and over-current protection, over temperature into a single low cost TDFN package.
Features
- Input Voltage Range: 4.2V to 5.5V
- Low Switching Quiescent Current
- 1A Output Current
- 0.1V Reference Voltage
- Constant on Time Mode Operation
- 3MHz Switching Frequency
- Power-On-Reset Detection on VIN
- Integrated Soft Start Time
- Over-Temperature Protection
- Over-Current Protection
- TDFN1.6x1.6 Package
General Description
The APW7584 is a synchronous step-down IR-LED driver adopting constant on time control mode. Due to increasing the oscillation to high frequency, the mounting area including peripheral components can be reduced. APW7584 also has low switching quiescent current to improve efficiency and battery-powered equipment using time. The APW7584 is equipped with Power-on-reset, internal soft start and over-current protection, over temperature into a single low cost TDFN package.
APW7502A
Active
5V/1.37A VCSEL and IR-LED Driver with I2C Interface
Features
General Description
The APW7502A is a 5V/1.37A, 2MHz buck converter with a 7-bit current DAC to provide a well regulated current source for VCSEL and IR_LED applications. Through I2C interface, the start-up slew rate of the current source can be 8-segment adjustable and the regulated level can be adjusted too from 100mA to 1.37A in 10mA resolution. When the buck converter output is overloaded or short circuited, the device limits the current at a safety level to prevent catastrophic failure. The over-temperature protection shuts down the device when junction temperature reaches 150oC and will automatically resume operating when junction temperature cools down by 20oC. The cathode of the flash LED is referenced to GND, which improves thermal performance. The device is available in WLCSP1.42x1.42-9 package.
Features
- Wide Input Voltage from 2.7V to 5.5V
- Programmable LED Source Current up to 1.37A per 10mA/step
- Programmable LED Source Current Slew Rate 10mA/0.5µs to 10mA/64µs
- Bypass Mode for Standby Mode
- 40µA Operation Standby Current
- Programmable Ramp-up Time for IR-LED Current
- Support Dimming Frequency up to 5KHz
- 1MHz/2MHz Selectable Switching Frequency
- I2C Interface
- Short Circuit and Thermal Shutdown Protection
- Available in WLCSP1.42x1.42-9
- Lead Free Green Devices Available (RoHS Compliant)
General Description
The APW7502A is a 5V/1.37A, 2MHz buck converter with a 7-bit current DAC to provide a well regulated current source for VCSEL and IR_LED applications. Through I2C interface, the start-up slew rate of the current source can be 8-segment adjustable and the regulated level can be adjusted too from 100mA to 1.37A in 10mA resolution. When the buck converter output is overloaded or short circuited, the device limits the current at a safety level to prevent catastrophic failure. The over-temperature protection shuts down the device when junction temperature reaches 150oC and will automatically resume operating when junction temperature cools down by 20oC. The cathode of the flash LED is referenced to GND, which improves thermal performance. The device is available in WLCSP1.42x1.42-9 package.
