el7571 Intersil Corporation, el7571 Datasheet - Page 11

• Manufacturer Part Number: el7571
• Description: Programmable Pwm Controller
• Manufacturer: Intersil Corporation

Skottky Diode, D
In the non-synchronous scheme a flyback diode is required
to provide a current path to the output when the high side
power MOSFET, Q
selecting D
Block Diagram
4.5V to
MegaMos
MegaMos
Siliconix
Fuji
IR
Motorola
12.6V
MANUFACTURER
L
2
1.5µH
2
240pF
220pF
(0:4)
3mF
is that it must have low forward voltage drop.
VID
C
1
C
SLOPE
C
1
ENABLE
OSC
2
, is switched off. The critical criteria for
MTB75N05HD
Mip30N03A
IRF3205S
V
2SK1388
MODEL
IN
Mi4410
Si4410
11
OTEN
Reference
Oscillator
4V
3.5V
+
+
-
-
UVLO HI
UVLO LOW
0.1µF
REF
Ramp Control
4.5V
4.5V
4.5V
V
4V
GS
4
4
DAC
FB
R
ON
20m:
22m:
20m:
37m:
C
8m:
7m:
S
(MAX)
EL7571
+
+
+
+
+
+
-
-
-
-
-
-
In Regulation
Soft
Start
¦
Current Reversal
ENABLE
PWRGD
17nF (max)
The product of forward voltage drop and condition current is
a primary source of power dissipation in the convertor. The
Schottky diode selected is the International Rectifier
32CTQ030 which has 0.4V of forward voltage drop at 15A.
6.4nF
6.3nF
4.3nF
7.1nF
C
GS
Control Logic
PWM
±17.5A
±10A
±15A
±10A
±98A
±75A
GND
ID
V
GNDP
LSD
INP
V
LX
HI
HSD
VDS
30V
30V
30V
55V
50V
0.1µF
5.1µH
7.5m:
PACKAGE
L
TO-220
TO-220
TO-220
1
D2Pak
SO-8
SO-8
V
OUT
C
6mF
2