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5962-8951104EA

Description
Switching Controller, Voltage-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, CDIP16, CERAMIC, DIP-16
CategoryPower/power management    The power supply circuit   
File Size770KB,13 Pages
ManufacturerUnitrode Corporation
Download Datasheet Parametric Compare View All

5962-8951104EA Overview

Switching Controller, Voltage-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, CDIP16, CERAMIC, DIP-16

5962-8951104EA Parametric

Parameter NameAttribute value
package instruction,
Reach Compliance Codeunknown
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage35 V
Minimum input voltage8 V
Nominal input voltage20 V
JESD-30 codeR-CDIP-T16
JESD-609 codee0
Number of functions1
Number of terminals16
Maximum operating temperature125 °C
Minimum operating temperature-55 °C
Maximum output current0.5 A
Package body materialCERAMIC, METAL-SEALED COFIRED
Package shapeRECTANGULAR
Package formIN-LINE
Certification statusNot Qualified
Maximum supply current (Isup)20 mA
surface mountNO
Switch configurationPUSH-PULL
Maximum switching frequency500 kHz
technologyBIPOLAR
Temperature levelMILITARY
Terminal surfaceTIN LEAD
Terminal formTHROUGH-HOLE
Terminal locationDUAL
Base Number Matches1
UC1525A/27A
UC2525A/27A
UC3525A/27A
Regulating Pulse Width Modulators
FEATURES
8 to 35V Operation
5.1V Reference Trimmed to
±1%
100Hz to 500kHz Oscillator
Range
Separate Oscillator Sync
Terminal
Adjustable Deadtime Control
Internal Soft-Start
Pulse-by-Pulse Shutdown
Input Undervoltage Lockout
with Hysteresis
Latching PWM to Prevent
Multiple Pulses
Dual Source/Sink Output
Drivers
DESCRIPTION
The UC1525A/1527A series of pulse width modulator integrated circuits are de-
signed to offer improved performance and lowered external parts count when used
in designing all types of switching power supplies. The on-chip +5.1V reference is
trimmed to
±1%
and the input common-mode range of the error amplifier includes
the reference voltage, eliminating external resistors. A sync input to the oscillator
allows multiple units to be slaved or a single unit to be synchronized to an external
system clock. A single resistor between the C
T
and the discharge terminals pro-
vides a wide range of dead-time adjustment. These devices also feature built-in
soft-start circuitry with only an external timing capacitor required. A shutdown termi-
nal controls both the soft-start circuitry and the output stages, providing instantane-
ous turn off through the PWM latch with pulsed shutdown, as well as soft-start
recycle with longer shutdown commands. These functions are also controlled by
an undervoltage lockout which keeps the outputs off and the soft-start capacitor
discharged for sub-normal input voltages. This lockout circuitry includes approxi-
mately 500mV of hysteresis for jitter-free operation. Another feature of these PWM
circuits is a latch following the comparator. Once a PWM pulse has been termi-
nated for any reason, the outputs will remain off for the duration of the period. The
latch is reset with each clock pulse. The output stages are totem-pole designs ca-
pable of sourcing or sinking in excess of 200mA. The UC1525A output stage fea-
tures NOR logic, giving a LOW output for an OFF state. The UC1527A utilizes OR
logic which results in a HIGH output level when OFF.
BLOCK DIAGRAM
2/96

5962-8951104EA Related Products

5962-8951104EA 5962-89511032A 5962-8951103EA 5962-8670407XA 5962-8951101EA UC1527AL
Description Switching Controller, Voltage-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, CDIP16, CERAMIC, DIP-16 Switching Controller, Voltage-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, CQCC20, LCC-20 Switching Controller, Voltage-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, CDIP16, DIP-16 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CQCC20, LCC-20 Switching Controller, Voltage-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, CDIP16, DIP-16 Switching Controller, Voltage-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, CQCC20, LCC-20
Reach Compliance Code unknown unknown unknown unknown unknown unknown
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE CURRENT-MODE VOLTAGE-MODE VOLTAGE-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 35 V 35 V 35 V 25 V 35 V 35 V
Minimum input voltage 8 V 8 V 8 V 12 V 8 V 8 V
Nominal input voltage 20 V 20 V 20 V 15 V 20 V 20 V
JESD-30 code R-CDIP-T16 S-CQCC-N20 R-CDIP-T16 S-CQCC-N20 R-CDIP-T16 S-CQCC-N20
JESD-609 code e0 e0 e0 e0 e0 e0
Number of functions 1 1 1 1 1 1
Number of terminals 16 20 16 20 16 20
Maximum operating temperature 125 °C 125 °C 125 °C 125 °C 125 °C 125 °C
Minimum operating temperature -55 °C -55 °C -55 °C -55 °C -55 °C -55 °C
Maximum output current 0.5 A 0.5 A 0.5 A 1 A 0.5 A 0.5 A
Package body material CERAMIC, METAL-SEALED COFIRED CERAMIC, METAL-SEALED COFIRED CERAMIC, METAL-SEALED COFIRED CERAMIC, METAL-SEALED COFIRED CERAMIC, METAL-SEALED COFIRED CERAMIC, METAL-SEALED COFIRED
Package shape RECTANGULAR SQUARE RECTANGULAR SQUARE RECTANGULAR SQUARE
Package form IN-LINE CHIP CARRIER IN-LINE CHIP CARRIER IN-LINE CHIP CARRIER
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum supply current (Isup) 20 mA 20 mA 20 mA 17 mA 20 mA 20 mA
surface mount NO YES NO YES NO YES
Switch configuration PUSH-PULL PUSH-PULL PUSH-PULL SINGLE PUSH-PULL PUSH-PULL
Maximum switching frequency 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz
technology BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR
Temperature level MILITARY MILITARY MILITARY MILITARY MILITARY MILITARY
Terminal surface TIN LEAD TIN LEAD TIN LEAD Tin/Lead (Sn/Pb) - hot dipped TIN LEAD Tin/Lead (Sn/Pb)
Terminal form THROUGH-HOLE NO LEAD THROUGH-HOLE NO LEAD THROUGH-HOLE NO LEAD
Terminal location DUAL QUAD DUAL QUAD DUAL QUAD
Base Number Matches 1 1 1 1 1 -
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