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EL7571 Datasheet(PDF) 11 Page - Renesas Technology Corp

Part # EL7571
Description  Programmable PWM Controller
PDF  19 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

EL7571 Datasheet(HTML) 11 Page - Renesas Technology Corp

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EL7571
FN7298 Rev 1.00
Page 11 of 19
October 25, 2004
Skottky Diode, D2
In the non-synchronous scheme a flyback diode is required to
provide a current path to the output when the high side power
MOSFET, Q1, is switched off. The critical criteria for selecting
D2 is that it must have low forward voltage drop. 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.
Block Diagram
MANUFACTURER
MODEL
VGS
RON (MAX)
CGS
ID
VDS
PACKAGE
MegaMos
Mi4410
4.5V
20m
6.4nF
±10A
30V
SO-8
MegaMos
Mip30N03A
4.5V
22m
6.3nF
±15A
30V
TO-220
Siliconix
Si4410
4.5V
20m
4.3nF
±10A
30V
SO-8
Fuji
2SK1388
4V
37m
±17.5A
TO-220
IR
IRF3205S
4
8m
17nF (max)
±98A
55V
D2Pak
Motorola
MTB75N05HD
4
7m
7.1nF
±75A
50V
TO-220
-
+
-
+
Reference
DAC
Ramp Control
Oscillator
-
+
-
+
-
+
-
+
-
+
-
+
PWM
Control Logic
L2
C1
3mF
4.5V to
12.6V
1.5µH
240pF
220pF
VID
(0:4)
3.5V
4V
UVLO HI
UVLO LOW
ENABLE
0.1µF
In Regulation
Current Reversal
Soft
Start
ENABLE
5.1µH
L1
7.5m
C2
6mF
VOUT
0.1µF
COSC
CSLOPE
VIN
OTEN
REF
FB
PWRGD
VINP
VHI
LX
HSD
LSD
GNDP
GND
CS



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