AME

7

AME5144

Rev.D.01

C

ie

High Efficiency, 37V Step-Up

Converter for 2 to 10 White LEDs

n Electrical Specifications (contd.)

Note 1: VD is the forward-voltage drop of the Schottky diode in Typical Application.

Note 2: Time from CTRL going below the Dual-Mode threshold to IC shutdown.

Parameter

Symbol

Min

Typ

Max Units

CS to Comp Transconductance

Gm

32

50

82

µS

COMP Input Resistance to

Ground

20

K

Ω

Switch Frequency

0.75

1.0

1.25

MHz

12

0

Maximum Duty Cycle

94

95

%

Switch On-Resistance

0.8

1.35

Ω

Switch Leakage Current

0.01

5

µΑ

Switch Current Limit

500

700

900

mA

%

In shutdown, UVLO or OVLO

Minimum Duty Cycle

PWM Mode

Test Condition

Duty Cycle=90%

CTRL=IN, CS=GND

CTRL=GND

Pulse Skipping