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UC2856QTIN/a450avaiAutomotive Catalog Improved Current Mode PWM Controller


UC2856Q ,Automotive Catalog Improved Current Mode PWM ControllerFEATURESDW PACKAGE• Pin-for-Pin Compatible With the UC2846(TOP VIEW)• 65-ns Typical Delay From Shut ..
UC2856Q1 ,Automotive Catalog Improved Current Mode PWM ControllerELECTRICAL CHARACTERISTICS(1)T =–40°C to 125°C, VIN = 15 V, RT = 10 kΩ, CT = 1 nF, and T = T (unles ..
UC2856QDWRQ1 ,Automotive Catalog Improved Current Mode PWM Controller 16-SOIC -40 to 125FEATURES• Qualified for Automotive ApplicationsDW PACKAGE• Pin-for-Pin Compatible With the UC2846(T ..
UC285T-1 ,1                   ..
UC285T-3 ,1                   ..
UC285T-ADJ ,1maximum ratings” may cause permanent damage to the device. These are stress ratings only, andfuncti ..
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UC2856Q
Automotive Catalog Improved Current Mode PWM Controller
EA−
COMP
AOUT
SYNC
DW PACKAGE
(TOP VIEW)

P0008-01
1FEATURES
Pin-for-Pin Compatible With the UC2846 65-ns Typical Delay From Shutdownto
Outputs and 50-ns Typical Delay From
Syncto Outputs
Improved Current Sense Amplifier With
Reduced Noise Sensitivity
Differential Current Sense With 3-V
Common Mode Range
Trimmed Oscillator Discharge Current for
Accurate Deadband Control
Accurate 1-V Shutdown Threshold High Current Dual Totem Pole
Outputs (1.5-A peak)
TTL Compatible Oscillator SYNC Pin
Thresholds
4-kV ESD Protection
DESCRIPTION

The UC2856isa high performance versionof the popular UC2846 seriesof current mode controllers, andis
intended for both design upgrades and new applications where speed and accuracy are important. All inputto
output delays have been minimized, and the current sense outputis slew rate limitedto reduce noise sensitivity.
Fast 1.5-A peak output stages have been addedto allow rapid low impedance TTL compatible sync output has been implementedasa
sync input.
Internal chip grounding has been improvedto minimize internal
loads. This,in conjunction with the improved differential current noise
immunity.
Other features includea trimmed oscillator current (8%) for accurate frequency and dead time control;a1V, 5%
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