CS5101 Datasheet, PDF (1/7 Pages) Cherry Semiconductor Corporation – Secondary Side Post Regulator for AC/DC and DC/DC Multiple Output Converters

CS5101
Secondary Side Post Regulator for AC/DC
and DC/DC Multiple Output Converters
Description
Features
The CS5101 is a bipolar monolithic
secondary side post regulator
(SSPR) which provides tight regula-
tion of multiple output voltages in
AC-DC or DC-DC converters.
Leading edge pulse width modula-
tion is used with the CS5101.
The CS5101 is designed to operate
over an 8V to 45V supply voltage
(V_CC) range and up to a 75V drive
voltage (V_C).
The CS5101 features include a totem
pole output with 1.5A peak output
current capability, externally pro-
grammable overcurrent protection,
an on chip 2% precision 5V refer-
ence, internally compensated error
amplifier, externally synchronized
switching frequency, and a power
switch drain voltage monitor. It is
available in a 14 lead plastic DIP or
a 16 lead wide body SO package.
Application Diagram
V_SY
1
TR
C_R4
3
Q1
6
R5
R6
L1
4
5
C_R5
R10
V_OUT
R8
R11
R13
+ _C6
R9
R12
R14
Gnd
C_R1
C5
R1
R2
C_R3
R7
R3 CR2
V_SYNC
V_D
V_{CC CS5101} V_C
V_{REF SSPR} VG
LGnd
PGnd
C4
V_FB
IS COMP
+
C1
C2 R4
COMP
IS-
RAMP
IS+
2
C3
C_R
s 1.5A Peak Output
(Grounded Totem Pole)
s 8V to 75V Gate Drive Voltage
s 8V to 45V Supply Voltage
s 300ns Propagation Delay
s 1% Error Amplifier
Reference Voltage
s Lossless Turn On and
Turn Off
s Sleep Mode: < 100µA
s Overcurrent Protection with
Dedicated Differential Amp
s Synchronization to External
Clock
s External Power Switch
Drain Voltage Monitor
Package Options
14L PDIP
SYNC 1
V_CC
V_REF
LGnd
V_FB
COMP
RAMP
V_D
V_C
V_G
PGnd
IS COMP
IS-
IS+
16L SO Wide
SYNC 1
V_CC
V_REF
DGnd
V_D
V_C
V_G
PGnd
AGnd
V_FB
COMP
RAMP
PGnd
IS COMP
IS-
IS+
Rev. 3/31/97
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: [phone] Fax: [phone]
Email: [e-mail]
Web Site: www.cherry-semi.com
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¨ Company