SGM3791
6-Channel, 100mA, Adaptive Boost LED Driver with PWM Based Pulsating LED Current and Constant Input Current Regulation
The SGM3791 is an adaptive Boost LED driver with integrated Boost switch and 6-channel LED sink for PWM based LED current. It adaptively adjusts the LED anode voltage based on the sinking current and cathode voltage, ensuring sufficient headroom for optimal operation. The SGM3791 maintains a constant inductor current when the LED sinking channel turns off to minimize unnecessary inrush current drawn from the input source.
The SGM3791 is a non-synchronous Boost converter with integrated 2.45A/31.3V power FET. In addition, an external isolation PFET gate drive control is integrated to provide true load disconnection as well as Boost output short protection.
The SGM3791 supports up to 9V input for 2-cell Li-Ion batteries in series configuration. And VCC UVLO rising threshold is 3.0V.
The device operates its six sink channels in a PWM-based current mode, controlled via external PWM input signals. These channels can be configured into two independent groups, each managed by separate PWM inputs, allowing flexible sink current programming.
The SGM3791 incorporates an I2C interface, providing programmability to function setting and status reading.
The SGM3791 integrates various protection features such as programmable Boost over-voltage threshold, system fault indications, LED string open and short detection, and thermal shutdown.
The device is available in a Green WLCSP-1.73×2.06- 20B package.
- Up to 9V Input Voltage Range
- 3.0V VCC UVLO Threshold for Device Configuration
- Asynchronous Peak Control ACFT Boost
- Up to 31.3V (TYP) Boost Output Voltage
- Adaptive LED Anode Voltage
- Constant Input Current Regulation during LED On and off
- Integrated 2.45A/31.3V Power MOSFET
- Integrated Isolation PFET Gate Driver
- Programmable Gate Drive Voltage in External Component Selection
- Built-in Soft-Start Function
- Six Current Sinking Channels
- PWM Dimming Mode
- Two Separate Groups with Independent PWM Input Control and Programmable Sink Current
- Up to 100mA (TYP) Sinking Current Per Channel
- Programmable PWM Time-Out Protection
- I2C Interface
- SGM3791A Slave Address: 0x28
- SGM3791B Slave Address: 0x29
- Protections and Indications
- Programmable Over-Voltage Protection
- Over-Current Protection
- Built-in LED Open and Short Protections
- Boost Start-up Short-Circuit Protection
- Fault Status Flags
- Available in a Green WLCSP-1.73×2.06-20B Package
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Part Number | Status | Package | Pins | Pd-Free | RoHS | REACH | Green | MSL Rating | Operating Temperature Range | Material Content | Reliability Report | Unit Resale Price* (Volume Range: in USD) | Lead Time** (Volume Range: Days) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SGM3791AYG/TR | Active | WLCSP-1.73×2.06-20B | 20 | YES | YES | YES | YES | MSL1 | -40℃ to +85℃ | View | View | |||
SGM3791BYG/TR | Active | WLCSP-1.73×2.06-20B | 20 | YES | YES | YES | YES | MSL1 | -40℃ to +85℃ | View | View |
* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.
** The lead time provided is for reference purposes only and is subject to change based on different circumstances.
