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CS4124 Datasheet(PDF) 1 Page - Cherry Semiconductor Corporation

Part No. CS4124
Description  High Side PWM FET Controller
Download  6 Pages
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Maker  CHERRY [Cherry Semiconductor Corporation]
Homepage  http://www.cherrycorp.com/
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CS4124 Datasheet(HTML) 1 Page - Cherry Semiconductor Corporation

   
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Features
s
150mA Peak PWM Gate
Drive Output
s
Patented Voltage
Compensation Circuit
s
100% Duty Cycle
Capability
s
5V, ± 3% Linear Regulator
s
Low Current Sleep Mode
s
Overvoltage Protection
s
Boost Mode Power
Supply
s
Output Inhibit
Package Option
High Side PWM FET Controller
CS4124
Description
Applications Diagram
Preliminary
1
OUTPUT
Gnd
INH
IADJ
PMP
SNI
VREG
BOOST
FLT
ROSC
COSC
CTL
PGnd
VCC
ISENSE+
ISENSE-
16 Lead PDIP
1195
Consult Factory for 16 Lead SOIC
Wide package.
Rev. 4/26/99
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
A
Company
®
The CS4124 is a monolithic integrat-
ed circuit designed primarily to
control the rotor speed of perma-
nent magnet, direct current (DC)
brush motors. It drives the gate of
an N channel power MOSFET or
IGBT with a user-adjustable, fixed
frequency, variable duty cycle,
pulse width modulated (PWM) sig-
nal. The CS4124 can also be used to
control other loads such as incan-
descent bulbs and solenoids.
Inductive current from the motor or
solenoid is recirculated through an
external diode.
The CS4124 accepts a DC level
input signal of 0 to 5V to control the
pulse width of the output signal.
This signal can be generated by a
potentiometer referenced to the on-
chip 5V linear regulator, or a fil-
tered 0% to 100% PWM signal also
referenced to the 5V regulator.
The IC is placed in a sleep state by
pulling the CTL lead below 0.5V. In
this mode everything on the chip is
shutdown except for the on-chip
regulator and the overall current
draw is less than 275µA. There are a
number of on-chip diagnostics that
look for potential failure modes and
can disable the external power
MOSFET.
VBAT 42.5µH
1000µF
1000µF
10K
10nF
100µF
.01µF
CFLT
.25µF
ROSC
COSC 470pF
93.1K
OUTPUT Gnd
INH
BOOST
FLT
ROSC
IADJ
PMP
SNI
VREG
COSC
CTL
PGnd
VCC
P1
N1
10µF
10K
100K
10K
10K
10K
RCS1
51
RCS2
51
CCS
.022µF
10K
10K
Input
470µH
MOT+
RGATE 6
RSENSE
4m
RSNI
4
1.5µF
1µF
1M
ISENSE+
ISENSE-
MOT-
RS
10


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