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Description

The AP8803 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 7 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 8V to 30V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AP8803 switches at frequency up to 700kHz. This allows the use of small size external components, hence minimizing the PCB area needed. Maximum output current of AP8803 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.2V or lower at CTRL shuts down the output at SW and puts the device into a low-current standby state.

Features

  • LED driving current up to 1A
  • High efficiency up to 92%
  • Operating input voltage up to 30V
  • High switching frequency up to 700kHz
  • PWM/DC input for dimming control
  • Built-in output open-circuit protection
  • TSOT25 is available in “Green” Mold Compound

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
Minimum Input Voltage 8 V
Maximum Input Voltage 30 V
Maximum Output Voltage 30 V
Maximum LED Current 1 A
LED Current Accuracy 8 %
Switching Frequency Maximum 700 kHz
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency 92 %
Operating Temperature Range -40 to 125 °C
Sense Voltage 100 mV
AEC-Q100 Grade No

Related Content

Packages
TSOT25

Technical Documents

SPICE Model

Evaluation Boards and User Guides

Recommended Soldering Techniques

RoHS CofC

Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AP8803WTG-7 Digi-Key Electronics 3608 11/18/2019 Buy Now United States
AP8803WTG-7 Mouser Electronics Inc. 5066 11/18/2019 Buy Now United States
AP8803WTG-7 RS Components 85 11/17/2019 Buy Now England
AP8803WTG-7 RS Components Ltd. 60 11/17/2019 Buy Now Japan
AP8803WTG-7 Farnell, An Avnet Company 3285 11/5/2019 Buy Now England