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EUP3651, EUP3651A, EUP3674

Table of contents:
Info of EUP3651
Info of EUP3651A
Info of EUP3674

EUP3651, EUP3651A, EUP3674 Selling Leads, Datasheet

MFG:EUTECH Package Cooled:TDFN-12 D/C:08+

EUP3651, EUP3651A, EUP3674 Datasheet download

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Part Number: EUP3651

MFG: EUTECH

Package Cooled: TDFN-12

D/C: 08+

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EUP3651 General Description

The EUP3651 is a high efficiency charge pump white LED driver. It supports 4 white LEDs with regulated constant current for uniform intensity. The EUP3651 maintains the highest efficiency by utilizing a 1.5X fractional charge pump and low dropout current regulators. A low external parts count (two 1uF flying capacitors and two small 1uF capacitors at VIN and VOUT) makes the EUP3651 ideally suited for small battery-powered applications.

The EN logic input is used to enable, disable, and set current with a 16-step linear scale.The LED current can be configured between 3mA and 30mA in regular mode and all current can be changed to 15% of previous setting when entering low power mode. If EN is kept low for more than 1.5ms, the EUP3651 enters shutdown mode.

The EUP3651 is available in a 12-pin 3mm x 3mm TDFN package.

EUP3651A General Description

The EUP3651A is a low noise, constant frequency charge pump that uses double mode, direct connection (1X) and fractional charge pump (1.5X) conversion, to maximize efficiency for white LED applications. The EUP3651A is capable of driving four white LEDs, separated into Main and Sub groups, each current channel is regulated with constant current for uniform intensity. A low external parts count (two 1uF flying capacitors and two small 1uF capacitors at VIN and VOUT) makes the EUP3651A ideally suited for small battery-powered applications.

The EN logic input is used to enable, disable, and set current for each group LED with a 16-step linear scale.Two groups LEDs can be configured with independent LED currents between 3mA and 30mA in regular mode and all current can be changed to 15% of previous setting when entering low power mode. If EN is kept low for more than 1.5ms, the EUP3651A enters shutdown.

The EUP3651A is available in a 12-pin 3mm x 3mm TDFN package (0.8mm max height).

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