CS8191 Datasheet, PDF (1/8 Pages) Cherry Semiconductor Corporation – Precision Air-Core Tach/Speedo Driver with Short Circuit Protection

CS8191
Precision Air-Core Tach/Speedo Driver
with Short Circuit Protection
Description
The CS8191 is specifically designed
for use with 4 quadrant air-core
meter movements. The IC includes
an input comparator for sensing
input frequency such as vehicle
speed or engine RPM, a charge
pump for frequency to voltage con-
version, a bandgap reference for
stable operation and a function
generator with sine and cosine
amplifiers that differentially drive
the motor coils.
The CS8191 has a higher torque
output and better output signal
symmetry than other competitive
parts (CS289, and LM1819). It is
protected against short circuit and
overvoltage (60V) fault conditions.
Enhanced circuitry permits func-
tional operation down to 8V.
Absolute Maximum Ratings
Supply Voltage ( ² 100ms pulse transient) ...........................................V_CC = 60V
(continuous) ..................................................................V_CC = 24V
Operating Temperature Range ........................................................-40¡C to +105¡C
Junction Temperature Range ...........................................................-40¡C to +150¡C
Storage Temperature Range.............................................................-55¡C to +165¡C
Electrostatic Discharge (Human Body Model) ...................................................4kV
Lead Temperature Soldering
Wave Solder (through hole styles only)..................10 sec. max, 260¡C peak
Reflow (SMD styles only)...................60 sec. max above 183¡C, 230¡C peak
Block Diagram
BIAS
CP+
SQ_OUT
FREQ_IN
Gnd
Gnd
COS+
COS-
V_CC
Charge Pump
Input
Comp.
+
Ð
Voltage
Regulator
V_REG
7.0V
COS
Output
Function
Generator
Ð
+
SINE
Output
+
Ð
High Voltage, Short
Circuit Protection
F/V_OUT
CP-
V_REG
Gnd
Gnd
SINE+
SINE-
Features
s Direct Sensor Input
s High Output Torque
s Wide Output Voltage
Range
s High Impedance Inputs
s Accurate down to 10V V_CC
s Fault Protection
Overvoltage
Short Circuit
s Low Voltage Operation
Package Options
16 Lead PDIP
(internally fused leads)
V_CC 1
V_{REG 2}
BIAS 3
Gnd 4
Gnd 5
COS- 6
SINE- 7
FREQ_{IN 8}
16 F/VOUT
15 CP+
14 CP-
13 ^Gnd
12 ^Gnd
11 COS+
10 SINE+
9 SQOUT
20 Lead SOIC
(internally fused leads)
V_CC 1
V_{REG 2}
BIAS 3
NC 4
Gnd 5
Gnd 6
NC 7
COS- 8
SIN- 9
FREQ_IN 10
20 F/VOUT
19 CP+
18 CP-
17 NC
16 Gnd
15 Gnd
14 NC
13 COS+
12 SIN+
11 SQ_OUT
Rev 3/9/99
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: [phone] Fax: [phone]
Email: [e-mail]
Web Site: www.cherry-semi.com
1
A
¨ Company