Datasheet Texas Instruments UC1856L

Manufacturer	Texas Instruments
Series	UC1856
Part Number	UC1856L

Datasheets

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PDF, 3.3 Mb, Revision: A, File published: Oct 7, 2010

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PACKAGE OPTION ADDENDUM www.ti.com 5-Dec-2011 PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) (Requires Login) 5962-9453001M2A ACTIVE LCCC FK 20 1 TBD Call TI Call TI 5962-9453001MEA ACTIVE CDIP J 16 1 TBD Call TI Call TI UC1856J ACTIVE CDIP J 16 1 TBD A42 N / A for Pkg Type UC1856J883B ACTIVE CDIP J 16 1 TBD A42 N / A for Pkg Type UC1856L OBSOLETE TO/SOT L 28 TBD Call TI Call TI UC1856L20 ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type UC1856L20883B ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type UC1856L883B OBSOLETE TO/SOT L 28 UC2856DW ACTIVE SOIC DW 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR UC2856DWG4 ACTIVE SOIC DW 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR UC2856DWTR ACTIVE SOIC DW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR UC2856DWTRG4 ACTIVE SOIC DW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR UC2856J ACTIVE CDIP J 16 1 TBD UC2856N ACTIVE PDIP N 16 25 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type UC2856NG4 ACTIVE PDIP N 16 25 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type UC3856DW ACTIVE SOIC DW 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR UC3856DWG4 ACTIVE SOIC DW 16 40 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR UC3856DWTR ACTIVE SOIC DW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR UC3856DWTRG4 ACTIVE SOIC DW 16 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR UC3856N ACTIVE PDIP N 16 25 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type UC3856NG4 ACTIVE PDIP N 16 25 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type TBD Addendum-Page 1 Call TI A42 Samples Call TI N / A for Pkg Type PACKAGE OPTION ADDENDUM www.ti.com 5-Dec-2011 Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login) UC3856Q ACTIVE PLCC FN 20 46 Green (RoHS
& no Sb/Br) CU SN Level-2-260C-1 YEAR UC3856QG3 ACTIVE PLCC FN 20 46 Green (RoHS
& no Sb/Br) CU SN Level-2-260C-1 YEAR (1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. …

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Status

Lifecycle Status	Obsolete (Manufacturer has discontinued the production of the device)
Manufacture's Sample Availability	No

Packaging

Pin	28
Package Type	L

Replacements

Replacement	UC1856L20
Replacement Code	P

Parametrics

Control Method	Current
Duty Cycle(Max)(%)	50
Frequency(Max)(kHz)	1000
Operating Temperature Range(C)	-55 to 125
Package Group	CDIP LCCC
Package Size: mm2:W x L (PKG)	See datasheet (CDIP)
Rating	Military
Special Features	Error Amplifier Synchronization Pin Soft Start Multi-topology
Topology	Boost Flyback Forward Full-Bridge Half-Bridge Push-Pull
UVLO Thresholds On/Off(V)	7.7/7
Vin(Max)(V)	40
Vin(Min)(V)	8

Eco Plan

RoHS	Not Compliant
Pb Free	No

Application Notes

Download
DN-45 UC3846 UC3856 and UCC3806 Push Pull PWM Current Mode Control ICs
PDF, 27 Kb, File published: Sep 5, 1999
The UC3856 is a pin-for-pin-compatible high-performance bipolar version of the industry standard UC3846. It can replace the UC3846 with few circuit modifications and it features increased speed higher gate-drive current and reduced propagation delays. The UCC3806 is a BiCMOS pin-for-pin compatible ultra-low-power version ideal for battery low-power and high-speed applications. The UCC3806
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DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode
PDF, 66 Kb, File published: Sep 5, 1999
This design note explains the differences between voltage-mode and current-mode switching power supply topologies. It includes a circuit diagram for each mode and suggests criteria for choosing which mode to use.

Model Line

Series: UC1856 (8)

5962-9453001M2A 5962-9453001MEA UC1856J UC1856J883B UC1856L UC1856L20 UC1856L20883B UC1856L883B

Manufacturer's Classification

Semiconductors > Space & High Reliability > Power Management Products > Offline and Isolated DC/DC Controller and Converter