TF4602 - 1.3 MHz Asynchronous Step-up Regulator White LED Driver

Product Type: LED Driver
Current Status: Final

Product Overview
The TF4602 is a monolithic asynchronous boost regulator. An integrated
500 mΩ Power MOSFET drives up to 13 parallel strings of 3 WLEDs. It operates at fixed 1.3 MHz switching frequency, maximizing conversion efficiency, enabling smaller external components and reducing output ripple. Combined with a wide input voltage range of 2.5V to 6V the TF4602 is an ideal solution for portable electronic devices.
The TF4602 features an integrated soft-start function that minimizes inrush current during turn-on. Under-voltage lockout, over-voltage and over-temperature protection features are added for system robustness. It is available with an internal low voltage references of 104 mV for high efficiency. The current mode control loop is compensated internally minimizing the number of external components.
The TF4602 is offered in space saving 8-pin QFN and 6-pin TSOT23 packages. It operates over the industrial temperature range of -40 °C to +85 °C temperature range.

Features

• Drives white LED arrays, up to 13x3 in size, for display backlightingWide input voltage range: 2.5V to 6V
• High efficiency enabled by an integrated 500 mΩ power MOSFET switch
• Low 104 mV internal reference voltage brings additional power savings
• Operates at fixed 1.3 MHz frequency for small filter size
• 0.1 μA typical shut-down supply current
• Integrated soft-start function, 28V over-voltage protection, over-temperature protection and input under-voltage lockout
• Industrial temperature range: -40 °C to +85 °C
• Available in space saving QFN-8 and TSOT23-6 packages