ame5144 AME, Inc., ame5144 Datasheet - Page 7

• Manufacturer Part Number: ame5144
• Description: High Efficiency, 37v Step-up Converter For 2 To 10 White Leds
• Manufacturer: AME, Inc.

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.
AME5144
Rev.D.01
CS to Comp Transconductance
COMP Input Resistance to
Ground
Switch Frequency
Minimum Duty Cycle
Maximum Duty Cycle
Switch On-Resistance
Switch Leakage Current
Switch Current Limit
Parameter
AME
Symbol
R
I
I
D
SW,CL
D
SW,LK
f
Gm
DS,ON
OSC
MAX
MIN
In shutdown, UVLO or OVLO
CTRL=IN, CS=GND
i e
C
Duty Cycle=90%
Converter for 2 to 10 White LEDs
Test Condition
Pulse Skipping
V
PWM Mode
I
CTRL=GND
SW
V
COMP
SW
=190mA
=37V,
=1.5V
High Efficiency, 37V Step-Up
0.75
Min
500
32
94
0.01
Typ
700
1.0
0.8
50
20
12
95
0
Max Units
1.25
1.35
900
82
5
MHz
K
mA
%
%
S
7