SGM37460

Active

6-CH, 150mA (MAX) Each, Boost WLED Driver with 15000:1 Dim Ratio and I2C Interface

SGM37460.pdf

The SGM37460 is a 6-channel high current LCD backlight display driver with integrated Boost converter.

The SGM37460 adopts peak current mode control for the output voltage regulation of the Boost converter. The device implements an external PMOS gate control for load disconnect. The device integrates 6 well-matched constant current sinks to control the LED string’s brightness, and each channel can provide up to 150mA constant current. The SGM37460 provides PWM, mix and analog dimming modes. It can be set either via MIX/AD pin or I²C interface. It also has a phase-shift function to eliminate noise during PWM dimming.

The SGM37460 integrates a 90mΩ Boost power, combined with adaptive Boost output voltage adjustment to achieve excellent efficiency. The device implements a standard I²C interface to maximize user programmability. The Boost converter’s switching frequency can be programmed by a resistor up to 2.2MHz, or via I²C interface. External clock signal can also be synchronized with SGM37460 to set the Boost converter’s switching frequency.

The SGM37460 integrates various protection features such as Boost over-current protection (OCP), Boost over-voltage protection (OVP), over-temperature protection (OTP), LED open protection, LED short protection and short LEDx-to-GND protection. In addition, the device integrates a sink current fold-back feature to reduce the sink channel current when device temperature rises above +140℃.

The SGM37460 is available in a Green TQFN-4×4- 24EL package with wettable flank.

FEATURES

Input Voltage Range: 3.5V to 36V
I²C Interface
Dedicated Fault Status Pin
Device Thermal Shutdown

Boost Converter:

Internal 90mΩ Power MOSFET
Programmable f_SW up to 2.2MHz
External Frequency Synchronization
Low EMI Frequency Spread Spectrum
Load Disconnect Switch Control
Cycle-by-Cycle Current Limit
Short Inductor Protection
Programmable OVP Threshold

LED Sink:

Up to 6 High-Precision Current Sinks, and Support:
- 6 Channel, 10 LEDs in series at 150mA Each
- 6 Channel, 12 LEDs in series at 120mA Each
- 4 Channel, 12 LEDs in series at 150mA Each
Programmable Dimming Options:
- Direct PWM Dimming
- Analog Dimming
- Mix Dimming with 25%/12.5% Transfer Point
Phase-Shift Function
15000:1 Dim Ratio in PWM Dim at f_PWM ≤ 200Hz
255:1 Dim Ratio at Analog Dim through PWM Dim Signal Input
2.5% Channel-to-Channel Matching
Optional Over-Temperature LED Current Reduction
LED Short and Open Protections
Programmable LED Short Threshold
Available in a Green TQFN-4×4-24EL Package with Wettable Flank

APPLICATIONS

LCD Backlight Display Driver

Ordering Information

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)
SGM37460XTVX24G/TR	Active	TQFN-4×4-24EL	24	YES	YES	YES	YES	MSL3	-40℃ to +125℃	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.