The SGM3810 is an integrated Boost mode WLED driver with single inductor dual output (SIDO) topological LCD Bias supply.
The SGM3810 integrates an asynchronous Boost WLED driver with high efficiency, low EMI and high output voltage. The Boost converter has a 32V, 1.6A internal FET and can work at 1.25MHz switching frequency. Its strong driving ability can drive single or multiple parallel LED strings, which can be well applied to LED drivers such as smart phone backlight and tablet backlight.
The maximum LED current can be programmed by the external current-sense resistor (RSET), and the LED current is programmed through an I2C interface by regulating the LED_FB pin voltage (VFB) as percentage of 200mV.
The SGM3810 generates both positive and negative precision regulated voltage power sources, with a single inductor dual output converter. Outputs are programmable in 100mV steps in 4.0V to 6.4V range and -4.0V to -6.4V range, which are commonly used in drivers for LCD displays, as well as in any other circuits requiring both rails with different loading on each rail. With input in the range of 2.5V to 5.5V, the device is optimized for loading 100mA in boost-inverter mode and also works in buck-inverter mode.
It also has complete protection functions, including open LED protection, OCP/OVP protection and thermal shutdown protection.
The SGM3810 is available in a Green WLCSP-1.1×1.75-15B package. It operates over an ambient temperature range of -40℃ to +85℃.
- WLED Driver
- Asynchronous Boost Topologic
- 12-Bit Resolution for Dimming Control
- Integrated 32V, 1.6A Current Limit MOSFET
- 32V Open LED Protection for 10 LEDs in Series
- Maximum 200mV Reference Voltage
- Up to 90% Efficiency
- 1.25MHz Switching Frequency
- LCD Bias
- Single Inductor for Positive & Negative Outputs
- 4.0V to 6.4V Programmable for Positive Output
- -4.0V to -6.4V Programmable for Negative Output
- 120mA Output Current for VVPO and VVNO at VIN > 3.0V
- 1% Output Voltage Accuracy
- 1.2MHz Switching Frequency
- Configurable Active Discharge
- I2C Interface with 1.2V Logic
- Under-Voltage Lockout (UVLO)
- Over-Temperature Protection (OTP)
- Short-Circuit Protection (SCP)
- Available in a Green WLCSP-1.1×1.75-15B Package
Smart Phones
Tablets
PADs
