ACE728E Datasheet, PDF (1/8 Pages) ACE Technology Co., LTD. – 42V Input Standoff Voltage, Step-Down LED Driver

ACE728E
42V Input Standoff Voltage, Step-Down LED Driver
Description
The ACE728E is a wide input range, high-efficiency, and high frequency DC-to-DC step-down LED driver,
capable of delivering up to 1.5A of output current. ACE728E provide 0.15V feedback voltage, which
minimize the power loss on the sense resistor in a LED driver system. With a fixed switching frequency of
600KHz, This current mode PWM controlled LED Driver allows the use of small external components,
such as ceramic input and output caps, as wel as small inductors. ACE728E also employs a proprietary
control scheme that switches the device into a power save mode during light load, thereby extending the
range of high efficiency operation. An OVP function protects the IC itself and its downstream system
against input voltage surges. With the hysteresis, EN can be controlled by the ambient light-sensitive
resistor.
ACE728E is available in a space-saving SOT23-6 package.
Features
 Wide Input Operating Range from 4.5V to 38V
 Standoff Input Voltage: 42V
 High Efficiency PFM mode at light load
 Capable of Delivering 1.5A
 No External Compensation Needed
 Current Mode control
 Logic Control Shutdown
 En can be controlled by ambient light
 Thermal shutdown and UVLO
 Available in SOT23-6 Package
Application
 IR LED driver for surveillance camera
 LED lighting
 Constant current source
Absolute Maximum Rating
Parameter
Value
IN Voltage
–0.3V to 42V
SW ,EN Voltage
–0.3V to VIN+0.3
BST Voltage
–0.3V to SW+6V
FB Voltage
–0.3V to 6V
SW to ground current
Internally limited
Operating Temperature Range
–40°C to 85°
Storage Temperature Range
.–55°C to 150°C
Thermal Resistance SOT23-6
θ_JA
220
θ_JC
110 °C/W
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.)
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