LM3423MHBKBSTEV/NOPB National Semiconductor, LM3423MHBKBSTEV/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM3423MHBKBSTEV/NOPB
• Description: BOARD EVAL BUCK BOOST LM3423
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3423MHBKBSTEV/NOPB

• Current - Output / Channel: 1A
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 35V
• Features: Dimmable
• Voltage - Input: 4.5 ~ 35V
• Utilized Ic / Part: LM3423
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM3423MHBKBSTEV

LM3423 TSSOP Pin Connection
Board Features
This evaluation board has all the necessary connections and
jumpers to evaluate the LM3423 controller in a boost con-
verter topology with the following operating features and op-
tions:
SETTING AVERAGE LED CURRENT
The LM3423 uses peak current-mode control to regulate the
boosted output voltage. An external current sense resistor
Test Point Designation
TP10
TP11
TP12
TP9
FIGURE 1. High-Side Sensing Circuit
LM3423 Pin Connection
Top View
3
R
the LED current, I
(pin 19) and HSN (pin 20). HSP and HSN are the inputs to a
high side sense amplifier that is used in combination with a
resistor tied to CSH (pin 4) and an error amplifier to program
a desired I
SENSE
(i.e. R9) in series with the LED load is used to convert
LED
current.
Test point for switch-node.
30080801
Test point for GROUND.
Test point for TIMR pin.
Test point for FLT pin.
LED
Function or Use
, into a voltage that is sensed by HSP
30080802
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