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The TPS40211, from analogue manufacturing giant Texas Instruments, is a 4.5 to 52V wide-input-voltage, non-synchronous boost controller that is intended for applications where the output is a regulated current instead of a regulated voltage. The device allows designers to manage LED lighting, industrial control and battery-powered systems. It efficiently drives high-power LEDs when the input voltage is less than the voltage needed to turn on the LEDs. The driver is designed to power multiple 1 to 5W high-brightness lamps in series and features a programmable closed soft start, over-current protection with automatic retry and a programmable oscillator frequency. The device's fixed-frequency current-mode control provides an improved transient response and simplified loop compensation. It is offered in a 10-pin PowerPAD and a 10-pin SON package.