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HT7L4091

Universal Step-Down PWM Control

For High Brightness LED Lighting Control

LED String vs. LED current

150

200

250

300

350

400

450

6

8

10

12

14

16

18

LED String

260Vac

85Vac

110Vac

170Vac

220Vac

These result curves use the same input limit resistor with different voltages. These results show the

performance only using a resistor to power up the device for a full range voltage input. For improved

efficiency with a full range voltage input, refer to the following application circuit.

Input Voltage vs. Efficiency

60

65

70

75

80

85

90

95

80

130

180

230

280

Vac(V)

10S LED

8S LED

12S LED

16S LED

14S LED

LED String vs. Efficiency

60

65

70

75

80

85

90

95

6

8

10

12

14

16

18

LED String

260Vac

85Vac

170Vac

110Vac

220Vac