UNITRODE UC17131, UC17132, UC17133, UC27131, UC27132 Technical data
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Smart Power Switch
UC17131/2/3
UC27131/2/3
UC37131/2/3
FEATURES
• 300mA Continuous Output Current
• Low Side or High Side Switch
Configuration
• 8V to 65V Operation
• Overload and Short Circuit Protection
• Power Interruption Protection
• +6V Regulated Voltage
• 2mA Quiescent Current
• Programmable Overcurrent and
Power Interruption Protection
• 1% to 30% Programmable Input
Comparator Hysteresis (on UC37132)
• Low and High Side Internal High
Current Clamps When Driving
Inductive Loads
DESCRIPTION
The UC37131, UC37132 and UC37133 are a family of smart power
switches which can drive resistive or inductive loads from the high side or
low side.
The UC37132 is available in 14 pin (DIP), 16 pin (SOIC), or 20 pin (CLCC)
packages and can accommodate both low side (load to VCC) or high side
(load to GND) configurations. The UC37131 and UC37133 are exclusively
for a low side or a high side configuration respectively and both are available in an 8 pin package.Both high side and low side configurations provide
high current switching with low saturation voltages which can drive resistive
or inductive loads.
The input to the switch is driven by a low voltage signal, typically 5V. Additionally, UC37132 features adjustable hysteresis. The output of the device
can switch a load between 8V and 65V.Output current capability is 300mA
continuous or 700mA peak.
The device also has inherent smart features that allow for programmable
turn-on delay in enabling the output following startup. The same capacitor
that specifies the turn-on delay is also used to program a VCC power interruption time. If VCC drops below a threshold for a time specified by this capacitor, the output is turned off and a new turn-on delay will be re-triggered.
Similarly, if high current persists longer than the response delay, the output
driver will operate in a very low duty cycle mode to protect the IC.
UC37132 BLOCK DIAGRAM
11VREF
6V/8mA
13
IN
1/2
VREF
12
HYST
INPUT
COMPARATOR
9
LED
6V
PRE-REGULATOR
TURN-ON/OFF
AND
SHORT CIRCUIT
PROTECTION
10
CDEL
Q
OUT
72V
7VCC
6
CSH
5
LS
4HS
3
CSL
2GND
UDG-98026
SLUS340 - APRIL 1999
UC37131 BLOCK DIAGRAM
UC17131/2/3
UC27131/2/3
UC37131/2/3
3VREF
6V/8mA
INPUT
IN
4
COMPARATOR
HYST (FIXED) =
30%
1/2
VREF
UC37133 BLOCK DIAGRAM
PRE-REGULATOR
6V
1
LED
TURN-ON/OFF
AND
SHORT CIRCUIT
PROTECTION
2
CDEL
8VCC
7
LS
72V
Q
OUT
6
CSL
5GND
UDG-98059
6V/8mA
IN
3VREF
INPUT
4
1/2
VREF
COMPARATOR
HYST (FIXED) =
30%
TURN-ON/OFF
SHORT CIRCUIT
PROTECTION
1
LED
6V
PRE-REGULATOR
AND
2
CDEL
Q
OUT
72V
8VCC
CSH
7
6HS
5GND
UDG-98060
2
ABSOLUTE MAXIMUM RATINGS
VCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65V
LS – HS (Clamped by internal circuitry) . . . . . . . . . . . . . . . 78V
CSH, LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65V
Output Current
Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mA
Peak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900mA
Remaining Pin Voltages . . . . . . . . . . . . . . . . . . . . . –0.3V to 9V
Storage Temperature . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Junction Temperature. . . . . . . . . . . . . . . . . . . –55°C to +150°C
Lead Temperature (Soldering, 10 sec.). . . . . . . . . . . . . +300°C
Currents are positive into, negative out of the specified terminal. Consult Packaging Section of Databook for thermal limitations and considerations of packages.
PLCC-20 (Top View)
(for UCX7132)
L Packages
N/C
LS
CSH
N/C
VCC
N/C
N/C
N/C
N/C
LED
3
4
5
6
7
8
91110 12 13
122019
HS
CSL
18
N/C
17
GND
16
N/C
15
N/C
14
IN
HYST
VREF
CDEL
CONNECTION DIAGRAMS
SOIC-16 (Top View)
(for UCX7132)
D Package
N/C
1
GND
2
CSL
3
HS
4
LS
5
CSH
6
N/C
7
VCC
8
DIL-8, SOIC-8 (Top View)
(for UCX7131)
J, N, or D Packages
LED
1
CDEL
VREF
IN
2
3
4
UC17131/2/3
UC27131/2/3
UC37131/2/3
N/C
16
IN
15
HYST
14
VREF
13
CDEL
12
LED
11
N/C
10
N/C
9
VCC
8
LS
7
CSL
6
GND
5
DIL-14 (Top View)
(for UCX7132)
J, or N Packages
N/C
GND
CSL
HS
LS
CSH
VCC
1
2
3
4
5
6
7
N/C
14
IN
13
HYST
12
VREF
11
CDEL
10
LED
9
N/C
8
PRODUCT SELECTION TABLES
PART
NUMBER CONFIGURATIONS
UCX7131 Low Side Only 8
UCX7132 Low Side or High Side 14, 16, 20
UCX7133 High Side Only 8
PACKAGE
PIN COUNT
DIL-8, SOIC-8 (Top View)
(for UCX7133)
J, N, or D Packages
LED
1
CDEL
VREF
PART
NUMBER
2
3
IN
4
TEMPERATURE
RANGE
UC1713X –55°C to +125°C J, L
UC2713X –40°C to +85°C D, N
UC3713X 0°C to +70°C D, N
VCC
8
CSH
7
HS
6
GND
5
AVAILABLE
PACKAGES
3
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