AP2152 Datasheet, PDF (1/18 Pages) Asahi Kasei Microsystems – 3CH High Power WLED Driver

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AP2152
3CH High Power WLED Driver
DESCRIPTION
The AP2152 is a 3 channel white LED driver IC. It is composed of a current mode DC/DC boost
converter with an internal power MOSFET and 3 channel constant current sources, which can drive up
to 10 LEDs per channel for a maximum of 30 LEDs.
The AP2152 achieves ±0.8% typ. LED current matching between each channel when the LED current
is set at 75.8mA. The LED current can be run up to a maximum of 120mA with the appropriate
external set resistor on the ISET pin.
The AP2152 operates over a wide input voltage range from 4.25V to 35V, and the switching
frequency goes up to a maximum of 2.5MHz with the appropriate external set resistor on the RT pin.
The switching frequency can also be synchronized with an external signal.
The AP2152 provides the LED dimming function via an external PWM signal, with a frequency range
from 100Hz to 20KHz.
The AP2152 provides LED open protection, LED short protection, OVP pin short protection, channel
short protection, over voltage protection, over current protection, thermal protection and UVLO.
FEATURES
White LED driving number: Maximum 30 pieces (10 pieces in series x 3 in parallel)
LED current matching: ±0.8% typ. (ILED=75.8mA)
LED maximum current: 120mA
Maximum switching frequency: 2.5MHz
PWM dimming frequency by applying external signal: Maximum 20kHz
Input voltage range: 4.25V∼35V
Built-in 45V power MOSFET
Error flag through serial interface
Synchronize with External frequency
Master – Slave configuration
LED open protection
LED short protection
OVP pin short protection
Output channel short protection
Overvoltage protection (OVP)
Over current protection
Thermal protection
UVLO
20 pin HTSSOP with heat-sink package
APPLICATIONS
Display backlight
Lighting equipment
MS1348-E-00
1
2012/05