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LM5034 Datenblatt(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Teilenummer LM5034
Bauteilbeschribung  High Voltage Dual Interleaved Current Mode Controller with Active Clamp
PDF  29 Pages
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Hersteller  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM5034 Datenblatt(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagram
Top View
20136802
20-Lead TSSOP
Ordering Information
Order Number
Package Type
NSC Package Drawing
Supplied As
LM5034MTC
TSSOP-20
MTC-20
73 Units per Rail
LM5034MTCX
TSSOP-20
MTC-20
2500 Units on Tape and Reel
Pin Description
PIN
NAME
DESCRIPTION
APPLICATIONS INFORMATION
1
OVLP
Active Clamp Overlap Adjust
An external resistor (10 k
Ω to 100 kΩ) sets the overlap time of the
active clamp outputs relative to the main outputs for both Controller 1
and Controller 2. The overlap time results in deadtime between each
main switch and its active clamp switch.
2
VIN
Input Supply
Input to the startup regulator. The operating input range is 13V to
100V with transient capability to 105V.
3
COMP1
PWM Control, Controller 1
The COMP1 input provides voltage feedback to the PWM comparator
inverting input of Controller 1 through a 3:1 divider. The OUT1 duty
cycle increases as the COMP1 voltage increases. An internal 5K
Ω
pull-up resistor to +5.0V provides bias current to an opto-coupler
transistor.
4
CS1
Current Sense Input, Controller 1
Input for current mode control and the current limit sensing. If the CS1
pin exceeds 0.5V the OUT1 pulse is terminated producing
cycle-by-cycle current limiting. External resistance connected to CS1
will adjust (increase) PWM slope compensation. This pin’s voltage
must not exceed 1.25V.
5
SS1
Soft-start, Controller 1
An internal 50 µA current source charges an external capacitor to set
the soft-start rate. During a current limit restart sequence, the internal
current source is reduced to 1 µA to increase the delay before retry.
Forcing SS1 below 0.5V shuts off Controller 1.
www.national.com
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