ACTIVE
Part Number
UM1663
Description
36V Boost LED Driver with PWM and single wire interface dimming
Status
ACTIVE
Channnels
1
Topology
Sync Boost
Dimming Mode
PWM
Iout(Max) (A)
1
Vin(Min) (V)
2.8
Vin(Max) (V)
5.5
Vout (Min) (V)
-
Vout (Max) (V)
36
Type
Inductive
Switching Frequency (MHz)
1
Max Efficiency(%)
85
Operating Temperature Range (℃)
-40 to 85
Package
SOT23-6
The UM1663S is a highly integrated LED driver IC capable of driving 10 WLEDs in series. It is composed of a current mode boost converter integrated with a 38V/1A power switch.
The UM1663S supports a wide input voltage range from 2.8Vto 5.5V and runs at a fixed frequency of 1MHz. The LED current is set via an external resistor and the feedback voltage is regulated to 200mV. During operation, the LED current is controlled by the duty cycle of the /SHDN input signal, which determines the feedback reference voltage.
The UM1663S can modify dimming to support 64-step pulse dimming. More details are shown in the Timing Diagram section.
The UM1663S also has internal overvoltage protection setting to prevent the output from exceeding the absolute maximum ratings during open LED conditions. It is available in Green SOT23-6 package and operates over an ambient temperature range of -40癈 to +85癈.
- High Output Voltage: Up to 36V
- Internal Soft-Start and Compensation
- 200mV Reference Voltage
- PWM Dimming and Frequency Range from 500Hz to 50kHz
- 64-Step Pulse Dimming
- Open LED Protection
- Internal Over Voltage Protection Setting
- Over Temperature Protection
- Current Limit Protection
- RoHS Compliant and Halogen Free
- Mobile Phone and Smart Phone
- Digital Camera and GPS
- Portable DVD Player
| Part Number | Packaging Type | Marking Code | Shipping Qty |
|---|---|---|---|
| UM1663S | SOT23-6 | UDC | 3000pcs/7Inch Tape & Reel |
