The TPS6131x family is an integrated solution with a wide feature set for driving up to three LEDs for still-camera flash strobe and video-camera lighting applications. It is based on a high efficiency synchronous boost topology with combinable current sinks to drive up to three white LEDs in parallel. The 2MHz switching frequency allows the use of small and low-profile 2.2µH inductors. To optimize overall efficiency, the device operates with a low LED-feedback voltage and regulated output-voltage adaptation.

The device integrates a control scheme that automatically optimizes the LED current flash budget as a function of the battery voltage condition.

The TPS6131x not only operates as a regulated current source, but also as a standard voltage boost regulator. The device enters power-save mode operation at light load currents to maintain high efficiency over the entire load current range. These operating modes can be useful to supply other high power devices in the system (e.g. hands-free audio PA).

To simplify video light and flash synchronization with the camera module, the device offers a dedicated control interface (STRB0, STRB1) for zero latency LED turn-on time.

• Operational Modes:
  • Video Light and Flash Strobe
  • Voltage Regulated Converter: 3.8V...5.7V with Down Mode
  • Standby: 2µA (typ.)
• LED VF Measurement
• Power-Save Mode for Improved Efficiency at Low Output Power, Up to 95% Efficiency
• I2C Compatible Interface up to 3.4Mbits/s
• Dual Wire Camera Module Interface
• Zero Latency Tx-Masking Input
• Hardware Reset Input
• Privacy Indicator LED Output
• GPIO/Power Good Output
• Various Safe Operation and Robust Handling Features:
  • LED Temperature Monitoring
  • Open/Short LED Detection/Protection
  • Integrated LED Safety Timer
  • Automatic Battery Voltage Droop Monitoring and Protection
  • Smooth LED Current Ramp-Up/Down
  • Undervoltage Lockout
• Total Solution Size of Less Than 25mm2
• Available in a 20-Pin NanoFree (CSP)
• APPLICATIONS
  • Single/Dual/Triple White LED Flash Supply for Cell Phones and Smart-Phones
  • Video Lighting for Digital Video Applications
  • General Lighting Applications
  • Audio Amplifier Power Supply