CAT3626: LED Driver, Charge Pump, 6-Channel, I2C Interface
内容: The CAT3626 is a high efficiency 1x/1.5x fractiona...
The CAT3626 is a high efficiency 1x/1.5x fractional charge pump with programmable dimming current in six LED channels. To ensure uniform brightness in LCD backlight applications, each LED channel delivers an accurate regulated current.
Low noise and input ripple is achieved by operating at a constant switching frequency of 1MHz which allows the use of small external ceramic capacitors. The 1x/1.5x fractional charge pump supports a wide range of input voltages from 3V to 5.5V with efficiency up to 91%, and is ideal for Li-Ion battery powered devices.
The LED channels are configured into three independent pairs, each containing 2 matched channels. Each pair can be separately programmed from zero to 32 mA, in 0.5 mA resolution steps, using the I2C serial interface. Any individual channel can be disabled while others remain active. When the enable input (EN) is low, the device is in shutdown mode drawing zero current.
Drives 6 LED channels
Independent current on 3 pairs of LEDs
I²C serial interface programming
Adjustable current to 32 mA in 0.5 mA steps
Power efficiency up to 91%
Fractional pump 1x/1.5x
Low noise input ripple
Fixed High Frequency Operation 1MHz
“Zero” Current Shutdown Mode
Soft start and current limiting
Short circuit protection
Thermal shutdown protection
LCD and keypad Backlighting
供給状況 & サンプル
Compliance: Pb-free Halide free
内容: LED Driver, Charge Pump, 6-Channel, I2C Interface
外形 タイプ: TQFN-16
外形 Case Outline: 510AE
梱包形態 タイプ: REEL
梱包形態 数量: 2000
Market Leadtime (weeks):2 to 4
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