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LM5035CSQ/NOPB Datenblatt(PDF) 24 Page - Texas Instruments

Teilenummer LM5035CSQ/NOPB
Bauteilbeschribung  LM5035C PWM Controller With Integrated Half-Bridge and SyncFET Drivers
PDF  43 Pages
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Hersteller  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM5035CSQ/NOPB Datenblatt(HTML) 24 Page - Texas Instruments

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LM5035C
CS
LO
AGND
Power
Transformer
HO
Q2
Q1
R1
RF
CF
VPWR
VIN
Current
Sense
Copyright © 2016, Texas Instruments Incorporated
LM5035C
9 V
VPWR
8.3 V ± 15 V
(from aux
winding)
VIN
VCC
Copyright © 2016, Texas Instruments Incorporated
LM5035C
VPWR
50
0.1 µF
VIN
Copyright © 2016, Texas Instruments Incorporated
24
LM5035C
SNVS631D – JANUARY 2010 – REVISED OCTOBER 2016
www.ti.com
Product Folder Links: LM5035C
Submit Documentation Feedback
Copyright © 2010–2016, Texas Instruments Incorporated
9.2.2.3 Current Sense
The CS pin needs to receive an input signal representative of the transformer’s primary current, either from a
current sense transformer or from a resistor in series with the source of the LO switch, as shown in Figure 18
and Figure 19. In both cases, the sensed current creates a ramping voltage across R1, and the RF/CF filter
suppresses noise and transients. R1, RF and CF should be located as close to the LM5035C as possible, and the
ground connection from the current sense transformer, or R1, should be a dedicated track to the AGND pin. The
current sense components must provide greater than 0.25 V at the CS pin when an overcurrent condition exists.
Figure 16. Input Transient Protection
Figure 17. Start-Up Regulator for VPWR >100 V
Figure 18. Current Sense Using Current Sense Transformer



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