LM3450AEV230V30/NOPB National Semiconductor, LM3450AEV230V30/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM3450AEV230V30/NOPB
• Description: LM3450A EVAL BOARD 230V30
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3450AEV230V30/NOPB

• Current - Output / Channel: 700mA
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 50V
• Features: -
• Voltage - Input: 180 ~ 265VAC
• Utilized Ic / Part: LM3450A
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pin Descriptions
Pin
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
COMP
Name
GATE
HOLD
FLT2
FLT1
BIAS
GND
V
V
ZCD
DIM
I
V
V
CS
FB
SEN
REF
ADJ
AC
CC
Compensation
Power Ground
Current Sense
Analog Adjust
Zero Crossing
Dynamic Hold
3V Reference
Rectified Line
Input Current
Pre-regulator
PWM Output
Description
Input Supply
Gate Drive
Feedback
Gate Bias
Sampled
Detector
500 Hz
Filter 2
Filter 1
Sense
Reference Output: Connect directly to V
to necessary external circuits.
Analog Dim and Phase Dimming Range Input: Connect directly to V
standard 70% phase dimming range. Connect to resistor divider from V
extend usable range of some phase dimmers or for analog dimming. Connect to
GND for low power mode.
Ramp Comparator Input: Connect a series resistor from FLT1 capacitor and a
capacitor to GND to establish second filter pole.
Angle Decoder Output: Connect a series resistor to a capacitor to GND to
establish first filter pole.
Open Drain PWM Dim Output: Connect to dimming input of output stage LED
driver (directly or with isolation) to provide decoded dimming command.
Multiplier and Angle Decoder Input: Connect to resistor divider from rectified AC
line.
Error Amplifier Output and PWM Comparator Input: Connect a capacitor to GND
to set the compensation.
Error Amplifier Inverting Input: Connect to output voltage via resistor divider to
control PFC voltage loop for non-isolated designs. Connect a 5.11kΩ resistor to
GND for isolated designs (bypasses error amplifier). Also includes over-voltage
protection and shutdown modes.
Input Current Sense Non-Inverting Input: Connect to diode bridge return and
resistor to GND to sense input current for dynamic hold. Connect a 0.1µF
capacitor and Schottky diode to GND, and a 0.22µF capacitor to HOLD.
System Ground
MosFET Current Sense Input: Connect to positive terminal of sense resistor in
PFC MosFET source.
Gate Drive Output: Connect to gate of main power MosFET for PFC.
Power Supply Input: Connect to primary bias supply. Connect a 0.1µF bypass
capacitor to ground.
Demagnetization Sense Input: Connect a 100kΩ resistor to transformer/inductor
winding to detect when all energy has been transferred.
Open Drain Dynamic Hold Input: Connect to holding resistor which is connected
to source of passFET.
Pre-regulator Gate Bias Output: Connect to gate of passFET and through resistor
to rectified AC (drain of passFET) to aid with startup.
3
Application Information
ADJ
or to resistor divider feeding V
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REF
REF
to force
ADJ
to
and