Manufacturer:
onsemi
CAT4139TD-GT3
LED DRVR 27Segment 5-Pin TSOT-23 T/R
Avnet Manufacturer Part #:
CAT4139TD-GT3
RoHS 10 Compliant
NCNR
The CAT4139TD-GT3 is a DC/DC Step-up Converter that delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1MHz allows the device to be used with small value external ceramic capacitors and inductor. LEDs connected in series are driven with a regulated current set by the external resistor R1. The CAT4139 is ideal for driving parallel strings of up to five white LEDs in series or up to 22V. LED dimming can be done by using a DC voltage, a logic signal or a pulse width modulation (PWM) signal. The shutdown input pin allows the device to be placed in power-down mode with 'zero' quiescent current. In addition to thermal protection and overload current limiting, the device also enters a very low power operating mode during 'Open LED' fault conditions.
Key Features
- 750mA Switch current limit
- Up to 87% efficiency
- Soft start "in-rush" current limiting
- Shutdown current less than 1µA
- Open LED overvoltage protection
- Thermal overload protection
Technical Attributes
Find Similar Parts|
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Description | Value |
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IC Mounting | Surface Mount |
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No. of Pins | 5 |
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Input Voltage | 2.8V to 5.5V |
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Output Current Max | 750 mA |
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Input Voltage Min | 2.8 V |
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Output Voltage Max | 22 V |
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Topology | Boost (Step Up) |
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No. of Outputs | 1 |
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Input Voltage Max | 5.5 V |
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Switching Frequency Typ | 1 MHz |
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LED Driver Type | Isolated |
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Operating Temperature Max | 85 °C |
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Operating Temperature Min | -40 °C |
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Output Current | 180 mA |
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IC Case / Package | TSOT-23 |
ECCN / UNSPSC / COO
| Description | Value |
|---|---|
| ECCN: | EAR99 |
| SCHEDULE B: | PARTS... |
| HTSN: | PARTS... |