BL8588 Datasheet, PDF (1/8 Pages) SHANGHAI BELLING CO., LTD. – High Efficiency Charge Pump 4-Channels LED Driver

BL8588
High Efficiency 1×/1.5× Charge Pump 4-Channels LED Driver
DESCRIPTION
BL8588 is a low noise, high efficiency, and
constant frequency charge pump DC/DC
converter for white LED application. The
operation frequency is 1MHz.
BL8588 works in load switch (1×) and
fractional (1.5×) modes with four independent
control outputs, each channel can provide
20mA constant current precisely from a 2.8V
to 5.5V supply. Only two external 1µF and
two 0.47µF capacitors are required to build a
compact and low-cost power supply solution.
BL8588 uses EN pin for simple on/off control
and single wire serial pulse dimming in 16
steps. A low current shutdown feature
disconnects the load from V_IN and reduces
quiescent current to less than 1µA.
FEATURES
• Input range: 2.8-5.5V
• ±1% LED current accuracy
• 20mA driver capacity each channel
• Auto 1×/1.5× mode switchover
• PWM dimming control
• Serial-pulse dimming control in linear 16
steps
• Short-circuit protection
• Thermal shutdown
• 1MHz constant switching frequency
• 3mm×3mm QFN package
APPLICATION
• Programmable Current Sinks
• White LED Backlighting
• Cell Phones and Smart phones
• PDAs, Digital Cameras, and Camcorders
• Color (RGB) Lighting
TYPICAL APPLICATION CIRCUIT
BL8588
www.belling.com.cn
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