LM3697YFQR Part Information

Details for LM3697YFQR by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs

Buy LM3697YFQR Directly from Texas Instruments (125677 in stock) at $0.2000

Part Description

The LM3697 11-bit LED driver provides highperformance backlight dimming for 1, 2, or 3 series LED strings while delivering up to 90% efficiency. The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency. The LM3697 is a high-efficiency three-string power source for backlight or keypad LEDs in smart-phone handsets. The high-voltage inductive boost converter provides the power for three-series LED strings for display backlight and keypad functions (HVLED1, HVLED2 and HVLED3). An additional feature is a pulse width modulation (PWM) control input for content adjustable backlight control, which can be used to control any highvoltage current sink. The LM3697 is fully configurable via an I2Ccompatible interface. The device operates over a 2.7-V to 5.5-V input voltage range and a −40°C to 85°C temperature range.

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Part Features

  • 11-Bit Configurable Dimming Resolution
  • 29-mm2
  • Adaptive Boost Output to LED Voltages
  • Drives Three Parallel High-Voltage LED Strings for Display and Keypad Lighting
  • Four Configurable Overvoltage Protection Thresholds (16 V, 24 V, 32 V, and 40 V)
  • Fully Configurable LED Grouping and Control
  • High-Voltage Strings Capable of up to 40-V Output Voltage and up to 90% Efficiency
  • Integrated 1-A/40-V MOSFET
  • Overcurrent Protection
  • PWM Input for Content Adjustable Brightness Control (CABC)
  • Selectable 500-kHz and 1-MHz Switching Frequency
  • Thermal Shutdown Protection
  • Up to 30 mA per Current Sink

Part Specifications

Device Topology Boost (Step Up)
Input Voltage Min 2.7V
Input Voltage Max 5.5V
Output Voltage Max 41.1V
Output Current Max 30mA
Switching Frequency 1.1MHz
No. of Outputs 1Outputs
IC Mounting SMD
Driver Case Style DSBGA
No. of Pins 12Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
Dimming Control Type Analogue PWM
Output Current 30mA
Output Voltage 40V
Topology Boost (Step Up)
RoHS Compliant

Alternative Part Descriptions

  • 3 String backlight driver with 11-bits of Exponential dimming | Texas Instruments

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