TC643VPA Microchip Technology, TC643VPA Datasheet - Page 3

• Manufacturer Part Number: TC643VPA
• Description: IC FAN/MOTOR DRIVER 8-DIP
• Manufacturer: Microchip Technology

Specifications of TC643VPA

• Applications: DC Motor Driver, Brushless (BLDC)
• Number Of Outputs: 1
• Voltage - Load: 15V
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Other names: 158-1034; 158-1034

© 2001 Microchip Technology Inc.
ELECTRICAL CHARACTERISTICS: (Cont.)
GND =
Symbol
t
t
NOTES: 1. See the Applications section for specific capacitor recommendations and guidelines.
.
(DIP/SOIC/MSOP)
INTEGRATED FAN / MOTOR DRIVER
PIN DESCRIPTION
PW
SHDN
Pin No.
2. Refer to the Applications section for a detailed explanation.
3. Automatic thermal shutdown is activated at approximately 150 C junction temperature.
4. Maximum sink current in MSOP package is limited by power dissipation.
1
2
3
4
5
6
7
8
Parameter
Pulse Width
Thermal Shutdown Temperature
DS21445A
Symbol
GND
ILMT
DRV
RPM
GND
C
FAN
V
EXT
CC
FAN
Description
Power Supply Input. The IC's supply voltage can be independent of the fan's supply
voltage. See Electrical Characteristics section.
Digital input. This pin directly drives the internal power driver. The power driver is
ON when this pin is HIGH, OFF when it is LOW. DRIVE is typically driven by a host
microcontroller or other digital logic with a PWM signal to accomplish fan/motor
speed control.
Digital (Open Collector) Output. If the output current, I
output will go low. I
stalled or shorted motor, or other fault.
Digital Output. Each time the motor current is interrupted by a pole-crossing, a
logic-level pulse occurs at this pin. Timing the fundamental frequency of the
resulting waveform yields motor RPM. See the Applications Section for more
details and example circuits.
Ground Terminal. This is the ground terminal for the IC itself. A separate ground
terminal, GND
External Capacitor. A 0.002 F capacitor between this pin and ground is used to
differentiate the fan's commutation pulses. This function is part of the internal signal
conditioning circuitry that generates the RPM output.
Analog input. The negative terminal of the fan motor is connected to this terminal.
This terminal is essentially the collector of an internal NPN transistor. It will be
pulled to within V
Analog Output. This is a separate ground terminal for the fan motor return current.
It is essentially the emitter of an NPN transistor. See the Electrical Characteristics
section for more details.
Test Conditions
Note 2
Over Operating Temperature Range, V
GND
FAN
3
FAN
CE(SAT)
, is provided for the motor.
FAN
= 0V, unless otherwise specified.
will be clamped at I
of GND
FAN
Min
20
when the PWM is on. FAN will stand off 15V.
—
LIMIT
. This serves as an indication of a
Typ
150
—
FAN
CC
, exceeds I
= 3.0V to 5.5V 10%,
Max
—
—
LIMIT
TC643-1
, this
TC643
Units
sec
C
9/29/97