TC622COA713 Microchip Technology, TC622COA713 Datasheet - Page 6

• Manufacturer Part Number: TC622COA713
• Description: IC TEMP SNSR PROG 5V 8SOIC
• Manufacturer: Microchip Technology

Specifications of TC622COA713

• Sensing Temperature: 0°C ~ 70°C
• Output Type: Active High, Active Low
• Voltage - Supply: 4.5 V ~ 18 V
• Accuracy: ±1°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Temperature Threshold: Programmable
• Full Temp Accuracy: 5 C
• Supply Voltage (max): 18 V
• Supply Voltage (min): 4.5 V
• Description/function: Low Cost Single Trip Point Temperature Sensor
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Supply Current: 600 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TC622/TC624
4.0
4.1
The TC622 can be used to create a simple over-tem-
perature shutdown circuit. In this circuit, temperature is
sensed within the system enclosure (internal system
ambient) or at the heatsink itself. When measured
temperature exceeds a preset limit, a fault is indicated
and the system shuts down.
Figure 4-1 illustrates an over-temperature shutdown
circuit using the TC622 sensor in a single TO-220
package, allowing direct attachment to the heatsink
surface. As shown, the TC622 outputs are driven active
when the heatsink temperature equals the trip point
temperature set by R
crowbar circuit is activated, causing the supply output
to fold back to zero. The TC622 outputs remain active
until the heatsink temperature falls a minimum of 2°C
(built-in hysteresis) below the trip point temperature, at
which time the device again allows normal supply
operation.
FIGURE 4-1:
DS21440B-page 6
TC622 Heatsink Mounting
TYPICAL APPLICATIONS
Over-Temperature Shutdown
Output
Device
Circuit Board
TC622
TC622 POWER SUPPLY OVER-TEMPERATURE SHUTDOWN
TRIP
Heatsink
. When this happens, the
R
TRIP
V
CC
T
GND
SET
TC622
Heatsink Surface
4.2
The TC622/TC624 can be used to control a DC fan as
shown in Figure 4-2. The fan turns on when the sensed
temperature rises above T
temperature falls below T
Figure 4-3 shows the TC622 acting as a heater
thermostat. Circuit operation is identical to that of the
cooling fan application.
V
OUT
OUT
DD
Cooling and Heating Applications
Output Device
OVERTEMP
©
SET
2002 Microchip Technology Inc.
SET
Power Good
Signal
- 2°C.
and remains on until the
Crowbar
V
Circuit
OUT