lm5045sqx National Semiconductor Corporation, lm5045sqx Datasheet - Page 3

• Manufacturer Part Number: lm5045sqx
• Description: Full-bridge Pwm Controller With Integrated Mosfet Drivers
• Manufacturer: National Semiconductor Corporation

Order Number
LM5045MH
LM5045MHX
LM5045SQ
LM5045SQX
TSSOP
Ordering Information
Pin Descriptions
Pin
1
2
LLP Pin
25
26
OVP/OTP Over Voltage Protection
Name
UVLO
Package Type
eTSSOP-28
eTSSOP-28
LLP-28
LLP-28
Line Under-Voltage Lockout
Description
LLP-28 Package
Top View
3
NSC Package Drawing
MXA28A
MXA28A
SQA28A
SQA28A
An external voltage divider from the power source sets the
shutdown and standby comparator levels. When UVLO reaches
the 0.4V threshold the VCC and REF regulators are enabled. At
the 1.25V threshold, the SS pin is released and the controller
enters the active mode. Hysteresis is set by an internal current
sink that pulls 20µA from the external resistor divider.
An external voltage divider from the input power supply sets the
shutdown level during an over-voltage condition. Alternatively, an
external NTC thermistor voltage divider can be used to set the
shutdown temperature. The threshold is 1.25V. Hysteresis is set
by an internal current that sources 20 µA of current into the
external resistor divider.
Application Information
Supplied As
Rail of 48 Units
Tape and Reel of 2500 Units
Available Soon
Available Soon
30145403
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