AME5144 Datasheet, PDF (7/15 Pages) AMETHERM Circuit Protection Thermistors – High Efficiency, 37V Step-Up Converter for 2 to 10 White LEDs

AME
AME5144
High Efficiency, 37V Step-Up
Converter for 2 to 10 White LEDs
n Electrical Specifications (contd.)
Parameter
CS to Comp Transconductance
COMP Input Resistance to
Ground
Switch Frequency
Symbol
Gm
f_OSC
Minimum Duty Cycle
D_MIN
Maximum Duty Cycle
Switch On-Resistance
Switch Leakage Current
Switch Current Limit
D_MAX
R_DS,ON
I_SW,LK
I_SW,CL
Test Condition
V_COMP=1.5V
In shutdown, UVLO or OVLO
PWM Mode
Pulse Skipping
CTRL=IN, CS=GND
I_SW=190mA
V_SW=37V,
CTRL=GND
Duty Cycle=90%
Min Typ Max Units
32 50 82 µS
20
KΩ
0.75 1.0 1.25 MHz
12
%
0
94 95
%
0.8 1.35 Ω
0.01 5 µΑ
500 700 900 mA
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.
C
ie
Rev.D.01
7