UNITRODE UC17131, UC17132, UC17133, UC27131, UC27132, UC27133, UC37131, UC37132, UC37133 Technical data
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UC17131
Smart Power Switch
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
UC17131/2/3
UC27131/2/3
UC37131/2/3
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
VREF |
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6V |
7 |
VCC |
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PRE-REGULATOR |
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6V/8mA |
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6 |
CSH |
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LS |
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INPUT |
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IN |
COMPARATOR |
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13 |
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72V |
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TURN-ON/OFF |
QOUT |
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4 |
HS |
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AND |
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1/2 |
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SHORT CIRCUIT |
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PROTECTION |
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CSL |
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VREF |
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2 |
GND |
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12 |
9 |
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HYST |
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CDEL |
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UDG-98026 |
SLUS340 - APRIL 1999 |
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UC17131/2/3
UC27131/2/3
UC37131/2/3
UC37131 BLOCK DIAGRAM
VREF |
3 |
6V |
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8 |
VCC |
PRE-REGULATOR |
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6V/8mA |
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7 |
LS |
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INPUT |
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IN |
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COMPARATOR |
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72V |
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HYST (FIXED) = |
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30% |
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TURN-ON/OFF |
QOUT |
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AND |
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1/2 |
SHORT CIRCUIT |
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PROTECTION |
6 |
CSL |
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VREF |
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5 |
GND |
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1 |
2 |
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LED |
CDEL |
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UDG-98059 |
UC37133 BLOCK DIAGRAM
VREF |
3 |
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6V |
8 |
VCC |
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PRE-REGULATOR |
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6V/8mA |
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7 |
CSH |
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INPUT |
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IN |
4 |
COMPARATOR |
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HYST (FIXED) = |
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72V |
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30% |
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QOUT |
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TURN-ON/OFF |
6 |
HS |
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AND |
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1/2 |
SHORT CIRCUIT |
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PROTECTION |
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VREF |
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5 |
GND |
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1 |
2 |
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LED |
CDEL |
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UDG-98060 |
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2 |
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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 |
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CSL |
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20 |
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N/C |
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N/C |
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VCC |
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GND |
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N/C |
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16 |
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N/C |
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N/C |
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N/C |
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N/C |
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14 |
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IN |
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N/C |
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10 |
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12 |
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13 |
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HYST |
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LED |
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VREF |
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CDEL |
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DIL-14 (Top View) (for UCX7132)
J, or N Packages
N/C |
1 |
14 |
N/C |
GND |
2 |
13 |
IN |
CSL |
3 |
12 |
HYST |
HS |
4 |
11 |
VREF |
LS |
5 |
10 |
CDEL |
CSH |
6 |
9 |
LED |
VCC |
7 |
8 |
N/C |
UC17131/2/3
UC27131/2/3
UC37131/2/3
CONNECTION DIAGRAMS
SOIC-16 (Top View)
(for UCX7132)
D Package
N/C |
1 |
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16 |
N/C |
GND |
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IN |
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2 |
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15 |
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CSL |
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HYST |
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3 |
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14 |
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HS |
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VREF |
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4 |
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13 |
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LS |
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CDEL |
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5 |
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12 |
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CSH |
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LED |
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11 |
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N/C |
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N/C |
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7 |
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VCC |
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N/C |
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8 |
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DIL-8, SOIC-8 (Top View) |
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(for UCX7131) |
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J, N, or D Packages |
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LED |
1 |
8 |
VCC |
CDEL |
2 |
7 |
LS |
VREF |
3 |
6 |
CSL |
IN |
4 |
5 |
GND |
DIL-8, SOIC-8 (Top View) |
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(for UCX7133) |
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J, N, or D Packages |
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LED |
1 |
8 |
VCC |
CDEL |
2 |
7 |
CSH |
VREF |
3 |
6 |
HS |
IN |
4 |
5 |
GND |
PRODUCT SELECTION TABLES
PART |
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PACKAGE |
NUMBER |
CONFIGURATIONS |
PIN COUNT |
UCX7131 |
Low Side Only |
8 |
UCX7132 |
Low Side or High Side |
14, 16, 20 |
UCX7133 |
High Side Only |
8 |
PART |
TEMPERATURE |
AVAILABLE |
NUMBER |
RANGE |
PACKAGES |
UC1713X |
–55°C to +125°C |
J, L |
UC2713X |
–40°C to +85°C |
D, N |
UC3713X |
0°C to +70°C |
D, N |
3