Regarding the change of names mentioned in the document, such as Hitachi
Electric and Hitachi XX, to Renesas Technology Corp.
The semiconductor operations of Mitsubishi Electric and Hitachi were transferred to Renesas
Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog
and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.)
Accordingly, although Hitachi, Hitachi, Ltd., Hitachi Semiconductors, and other Hitachi brand
names are mentioned in the document, these names have in fact all been changed to Renesas
Technology Corp. Thank you for your understanding. Except for our corporate trademark, logo and
corporate statement, no changes whatsoever have been made to the contents of the document, and
these changes do not constitute any alteration to the contents of the document itself.
Renesas Technology Home Page: http://www.renesas.com
Renesas Technology Corp.
Customer Support Dept.
April 1, 2003
To all our customers
Cautions
Keep safety first in your circuit designs!
1. Renesas Technology Corporation puts the maximum effort into making semiconductor products better
and more reliable, but there is always the possibility that trouble may occur with them. Trouble with
semiconductors may lead to personal injury, fire or property damage.
Remember to give due consideration to safety when making your circuit designs, with appropriate
measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of nonflammable material or
(iii) prevention against any malfunction or mishap.
Notes regarding these materials
1. These materials are intended as a reference to assist our customers in the selection of the Renesas
Technology Corporation product best suited to the customer's application; they do not convey any
license under any intellectual property rights, or any other rights, belonging to Renesas Technology
Corporation or a third party.
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third-party's rights, originating in the use of any product data, diagrams, charts, programs, algorithms, or
circuit application examples contained in these materials.
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algorithms represents information on products at the time of publication of these materials, and are
subject to change by Renesas Technology Corporation without notice due to product improvements or
other reasons. It is therefore recommended that customers contact Renesas Technology Corporation
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rising from these inaccuracies or errors.
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(http://www.renesas.com).
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or system that is used under circumstances in which human life is potentially at stake. Please contact
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contained therein.
HA16341NT/FP, HA16342NT/FP
Redundant Secondary Switching Power Supply Controller
ADE-204-035C (Z)
Rev.3
Apr. 2001
Description
The HA16341NT/FP and the HA16342NT/FP are switching regulator control ICs for the off-line
converters of redundant power supplies.
The HA16342NT/FP is reverse current detection less version of the HA16341NT/FP.
The HA16341NT/FP have the functions of current sharing and hot swap control for redundancy. These
functions enable high efficiency and high reliability for switching power supplies.
Combination the HA16341 with the HA16141 is suitable for the redundant AC to DC converters.
Features
Secondary-side synchronous rectification control
Main switching controller
Dead-time adjustment for synchronous rectification MOS
Current share function with line resistance compensation
Hot swap power MOS FET control
Remote on/off function, FAIL output function
Synchronized switching with primary side
Soft start function
Maximum duty adjustment
Overcurrent limiting, overcurrent shutdown functions
Reverse current detection (only the HA16341NT/FP)
Light load detection
OVP function
VCC pin UVL function
HA16341NT/FP, HA16342NT/FP
Rev.3, Apr. 2001, page 3 of 3
Pin Functions
Pin No.
DP-24TS FP-26DT
Symbol
Pin Name
1
1
CS(+)
Current sense amp input (+)
2 2 CS(
-)
Current sense amp input (
-)
3
3
MT
Current sense amp output
4 4 CB
Current
bus
output
5
5
Cin
Line resistance compensation input
6 6 SGND Signal
ground
7 8 PG1
Remote
on/off
8
9
FAIL
FAIL output (open-drain)
9 10
Trig
External
synchronization
input
10 11 CT
Timing
capacitance
11 12 SS
Soft
start
12 13 DB
Dead
band
13
14
Vref
Vref (5 V)
14
15
HSP
Hot swap output
15
16
PWM OUT
PWM output
16
17
MR OUT
MR output
17
18
VCC
Power supply voltage
18
19
MF OUT
MF output
19
21
EOUT
Error amp output
20
22
EIN
Error amp input
21
23
CFB
Current share feedback output
22
24
CFo
Current share differential amp output
23 25 CF(
-)
Current share differential amp input (
-)
24
26
CF(+)
Current share differential amp input (+)
TAB
TAB, 7, 20
PGND
Power ground
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