Cherry Semiconductor CS4124YN16 Datasheet

Features

■ 150mA Peak PWM Gate

Drive Output

■ Patented Voltage

Compensation Circuit

■ 100% Duty Cycle

Capability

■ 5V, ± 3% Linear Regulator

■ Low Current Sleep Mode

■ Overvoltage Protection

■ Boost Mode Power

Supply

■ Output Inhibit

Package Option

CS4124

High Side PWM FET Controller

CS4124

Description

Applications Diagram

Preliminary

OUTPUT

Gnd
INH
I

ADJ

PMP
SNI

V

REG

BOOST

FLT

R

OSC

C

OSC

CTL

PGnd

V

CC

I

SENSE+

I

SENSE-

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: [phone] Fax: [phone]

Email: [e-mail]

Web Site: www.cherry-semi.com

A Company

®

The CS4124 is a monolithic integrat­ed circuit designed primarily to
control the rotor speed of perma­nent 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) sig­nal. The CS4124 can also be used to
control other loads such as incan­descent 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 on­chip 5V linear regulator, or a fil­tered 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.

V

BAT

42.5µH

1000µF

1000µF

10K

10nF

100µF

.01µF

C

FLT

.25µF

R

OSC

C

OSC

470pF

93.1K

OUTPUT

Gnd

INH

BOOST
FLT

R

OSC

I

ADJ

PMP

SNI

V

REG

C

OSC

CTL
PGnd

V

CC

P1

N1

10µF

10K

100K

10K

10K

10K

R

CS1

51

R

CS2

51

C

CS

.022µF

10K

10K

Input

470µH

MOT+

R

GATE

6

R

SENSE

4m

R

SNI

4

1.5µF

1µF

1M

I

SENSE+

I

SENSE-

MOT-

R

S

10

1

Electrical Characteristics:

4V ≤ VCC≤ 26V, -40˚C < TA< 125°C, (unless otherwise specified)

CS4124

1196

Absolute Maximum Ratings

Storage Temperature ................................................................................................................................................-65˚C to 150˚C

V

CC

.................................................................................................................................................................................-0.3V to 30V

V

CC

Peak Transient Voltage (load dump = 26V w/series 10Ω resistor) ...........................................................................40V

Input Voltage Range (at any input) ...........................................................................................................................-0.3V to 10V

Maximum Junction Temperature ..........................................................................................................................................150˚C

Lead Temperature Soldering

Wave Solder (through hole styles only) ......................................................................................10 sec. max, 260°C peak

ESD Capability (Human Body Model) ....................................................................................................................................2kV

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

■ V

CC

Supply

Operating Current Supply 7V ≤ VCC≤ 18V 5 10 mA

4V ≤ VCC< 7V, 18V < VCC≤ 26V 15 mA
Quiescent Current VCC= 12V 170 275 µA
Overvoltage Shutdown 26.5 29 V

■ Control (CTL)

Control Input Current CTL = 0V to 5V -2 0.1 2 µA
Sleep Mode Threshold 8% 10% 12% V

REG

Sleep Mode Hysteresis 7V ≤ VCC≤ 26V 50 100 150 mV

4V ≤ VCC< 7V 10 150 mV

■ Current Sense

Differential Voltage Sense 7V ≤ VCC≤ 18V

I

ADJ

= 1V and R

CS1

= 51Ω 18 34 mV

I

ADJ

= 4V and R

CS1

= 51Ω 104 125 mV

4V ≤ VCC< 7V

I

ADJ

=1V and R

CS1

= 51Ω 15 39 mV

18V < VCC≤ 26V

I

ADJ

= 1V and R

CS1

= 51Ω 15 39 mV

I

ADJ

= 4V and R

CS1

= 51Ω 102 130 mV

I

ADJ

Input Current 4V ≤ VCC≤ 26V -2 0.3 2 µA

I

ADJ

= 0V to 5V

■ Linear Regulator

Output Voltage, V

REG

VCC= 4V 2.0 V

VCC= 13.2V 4.85 5.15 V

VCC= 26V 4.85 5.20 V

■ Inhibit

Inhibit Threshold 40% 50% 60% V

REG

Inhibit Hysteresis 4V ≤ VCC≤ 7V 100 500 mV

7V ≤ VCC≤ 26V 150 325 500 mV

■ External Drive (OUTPUT)

Output Frequency 4V ≤ VCC< 7V

R

OSC

= 93.1kΩ, C

OSC

= 470pF 10 25 kHz

7V ≤ VCC≤ 18V,

R

OSC

= 93.1kΩ, C

OSC

= 470pF 17 20 23 kHz

18V < VCC≤ 26V

R

OSC

= 93.1kΩ, C

OSC

= 470pF 17 20 25 kHz