lm5025bmtcx National Semiconductor Corporation, lm5025bmtcx Datasheet - Page 2

• Manufacturer Part Number: lm5025bmtcx
• Description: Active Clamp Voltage Mode Pwm Controller
• Manufacturer: National Semiconductor Corporation

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Connection Diagram
Ordering Information
Pin Descriptions
Pin
Order Number
LM5025BMTC
LM5025BMTCX
LM5025BSD
LM5025BSDX
1
2
3
4
5
6
RAMP
Name
TIME
REF
CS1
CS2
V
IN
Source Input Voltage
Modulator ramp signal
Current sense input for cycle-by-cycle limiting If CS1 exceeds 0.25V the outputs will go into
Current sense input for soft restart
Output overlap/Deadtime control
Precision 5 volt reference output
Package Type
TSSOP-16
TSSOP-16
LLP-16
LLP-16
Description
16-Lead TSSOP, LLP
NSC Package Drawing
MTC-16
MTC-16
SDA-16A
SDA-16A
2
Input to start-up regulator. Input range 13V to 100V,
with transient capability to 105V.
An external RC circuit from Vin sets the ramp slope.
This pin is discharged at the conclusion of every
cycle by an internal FET, initiated by either the
internal clock or the V*Sec Clamp comparator.
Cycle-by-Cycle current limit. CS1 is held low for
50ns after OUT_A switches high providing leading
edge blanking.
If CS2 exceeds 0.5V the outputs will be disabled and
a softstart commenced. The soft-start capacitor will
be fully discharged and then released with a pull-up
current of 1µA. After the first output pulse (when SS
=1V), the SS charge current will revert back to 20µA.
An external resistor (R
time or dead time for the active clamp output. An
R
produces in-phase OUT_A and OUT_B pulses with
overlap. An R
and REF produces out-of-phase OUT_A and OUT_B
pulses with deadtime.
Maximum output current: 10mA Locally decouple
with a 0.1µF capacitor. Reference stays low until the
V
satisfied.
CC
SET
UV comparator and line UVLO comparator are
20141116
resistor connected between TIME and GND
SET
Application Information
resistor connected between TIME
Supplied As
92 Units per anti-static tube
2500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
SET
) sets either the overlap