MD1620F
Feature
Input Voltage Range 12-57V Maximum Output Current 2A Included main MOSFET switch and free wheel SBD Fixed Frequency 250k Hz PWM Control Over Current Protection Function Low Input Voltage Protection Function ( ULVO) Thermal Shut Down Function
Recruit Ikebukuro Bldg., 13-23, 1-chome, Minami Ikebukuro, Toshima-ku, Tokyo 171-0022, Japan Phone: Tokyo(03)5951-8106 Fax :(03)5951-8089
Block Diagram
Vref
Vcc
Vboot
TAB2
UVLO
START =11.3V STOP =10.8V
BOOT reference Vref=11V
Driver Vref=Vout+10V reference Vref=5V +
- 5%
100 C 150 C
Main Switch MOS OFF driver
Error amp 5.0VF/B Q 2.5V 3V 1V OSC f=250k Hz CLM Vth= 0.1~0.2V 1 2 3 4 24 8~11 R S
PWM p
TAB1
VOUT
CHOUT amp- amp OUT
S/S F/B OCL- OCL+
P.GND
Application Example
Pin Layout
INPUT 12~57V
Vboot VDD VCC
VB VOUT
OUTPUT 5V
OCL+
S/S : 1 F/B OCL- : 2 OCL+ : 3 GND : 4 Vcc : 5 Vboot : 6 N/C : 7
28 : amp27 : amp OUT 26 : Vref 25 : CHOUT 24 : GND 23 : VB 22 : VG amp...
