Features: ` 80% Efficient Synchronous Boost Converter 500-mA LED Current From 3.3-V Input(TPS61058) 800-mA LED Current From 3.3-V Input(TPS61059)` Input Voltage Range: 2.7 V to 5.5 V` Fixed Frequency 650 kHz (Typ) Operation` LED Disconnect During Shutdown` Open/Shorted LED Protection` Over-Tempe...
TPS61058: Features: ` 80% Efficient Synchronous Boost Converter 500-mA LED Current From 3.3-V Input(TPS61058) 800-mA LED Current From 3.3-V Input(TPS61059)` Input Voltage Range: 2.7 V to 5.5 V` Fixed Freque...
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Power Management IC Development Tools 2 batt cells
TPS61058/9 | |
Input voltage range on PVIN, VIN, EN, FB, IOK, SW, VOUT | -0.3 V to 7 V |
Power dissipation | Internally limited |
Operation temperature range, TA | -40°C to 85°C |
Maximum operating junction temperature, TJ(max) | 150°C |
Storage temperature range, Tstg | -65°C to 150°C |
The TPS61058/9 devices are fixed frequency,synchronous boost dc-dc converters with an integrated down conversion mode. The TPS61058/9 are optimized for driving high power single cell white LEDs up to 800 mA from a 2.7-V to 5.5-V input. The LED current can be programmed to different levels(e.g. torch, flashlight) by a set of external resistors.
The boost converter of TPS61058/9 is based on a 650 kHz fixed frequency, pulse-width-modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. The maximum peak current of TPS61058/9 in the boost switch is limited to 1000 mA (TPS61058) and 1500 mA (TPS61059).
The TPS61058/9 can be disabled to maximize battery life. In the shutdown mode, the load is completely disconnected and the current consumption is reduced to less than 1 A. Built-in precharge and soft-start circuitry of TPS61058/9 prevents excessive inrush current during start-up.
The TPS61058/9 is packaged in a 10-pin QFN PowerPAD™ package measuring 3 mm x 3 mm (DRC).