AP2061 Datasheet, PDF (1/24 Pages) Asahi Kasei Microsystems – 2.0A High-side LED Driver for Camera Flash with I2C

CONFIDENTIAL
[AP2061]
ASAHI KASEI MICRODEVICES
= Preliminary=
AP2061
2.0A High-side LED Driver for Camera Flash with I²C
GENERAL DESCRIPTION
The AP2061 is a white LED driver IC for camera flash applications in portable equipments. The device
integrates a current mode synchronous boost DC/DC converter and maximum 2A current sources. The
internal boost DC/DC converter integrates a switching FET and synchronous rectifier, and supports a
small size multilayer inductor with 4MHz switching frequency. The internal current sources allow for
grounded cathode connections for easier heat dissipation and simple LED arrangement. AP2061
includes eight protections that are LED thermal detection, inductor current limitation, input voltage
detection, over voltage protection, under voltage lock out, device thermal protection, LED open/short
protection and output-ground short protection to avoid significant system problems. Flash current, torch
current, inductor limit current and flash on-time is programmable through I²C interface. The device uses
a small size package (CSP: 1.6mm x 1.6mm, 0.4mm pitch, 16pins) to utilize less board space.
FEATURE
Power Supply Voltage: 2.7V~5.5V
LED Current: max 2.0A, total (max 1A/ch)
High-Side current source
Switching Frequency: 4.0 MHz
Automatically select working mode (DC/DC Bypass)
Synchronized with RF power-Amplifier pulse
I²C Function:
- Flash LED current setting
- Torch LED current setting
- Flashing on-time setting
- Current limit value setting
- LED thermal detection voltage setting
- Battery detection voltage setting
- Error read support
Protection Function:
- LED thermal detection
- Inductor current limit
- Battery voltage detection
- Over voltage protection (OVP)
- Under voltage lock out (UVLO)
- Thermal shutdown
- LED open/short
- Output-ground short
Ta: -30 ~ 85°C
Package: 16 pins CSP (1.6 x 1.6mm, 0.4mm pitch)
Rev.0.1
-1-
2012/10