CAT3649: LED Driver, 6-Channel, with 32 Dimming Levels and PWM
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The CAT3649 is a high efficiency fractional charge pump that can drive up to six LEDs. The inclusion of a 1.33x fractional charge pump mode increases the device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors.
Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors. The multi-fractional charge pump supports a wide range of input voltages from 2.4 V to 5.5 V.
The LED current can be adjusted in different ways. The full-scale LED current is set to 25 mA once the device is enabled. Analog dimming in 32 linear steps is achieved via a 1-wire pulse-dimming input (ADIM). Further adjustment of the LED current can be done by applying a pulse width modulation (PWM) signal on the PWM input. The PWM dimming control is compatible with content adaptive brightness control (CABC) for a wide range of PWM signal frequency up to 200 kHz.
The CAT3649 can be shut down by holding the ADIM or PWM input in a logic low condition for greater than 30 ms.
Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors. The multi-fractional charge pump supports a wide range of input voltages from 2.4 V to 5.5 V.
The LED current can be adjusted in different ways. The full-scale LED current is set to 25 mA once the device is enabled. Analog dimming in 32 linear steps is achieved via a 1-wire pulse-dimming input (ADIM). Further adjustment of the LED current can be done by applying a pulse width modulation (PWM) signal on the PWM input. The PWM dimming control is compatible with content adaptive brightness control (CABC) for a wide range of PWM signal frequency up to 200 kHz.
The CAT3649 can be shut down by holding the ADIM or PWM input in a logic low condition for greater than 30 ms.
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Technical Documentation & Design Resources
Software (1) | Package Drawings (1) |
Data Sheets (1) | Evaluation Board Documents (5) |
Evaluation/Development Tool Information
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CAT3649AGEVB | Active |
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High Efficiency Quad-Mode Fractional Charge Pump Evaluation Board |
Availability & Samples
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Specifications
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Case Outlines
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Application Diagram
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Intaractive Block Diagram
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Case Outline |
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CAT3649HV3-GT2 | Active |
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CAT3649 | TQFN-16 | 510AD | 1 | 260 | Tape and Reel | 2000 | $0.4693 |
Market Leadtime (weeks) | : | 2 to 4 |
ON Semiconductor (2020-09-02 00:00) | : | 56,000 |
Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
VIN Min (V)
VIN Max (V)
VO Max (V)
IO Max (mA)
fSW Typ (kHz)
Package Type
Application
Diagram - Block
Support |