LM3423MHBKBSTEV/NOPB National Semiconductor, LM3423MHBKBSTEV/NOPB Datasheet - Page 2

• 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

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Board Connections and
Configuration
Connecting the evaluation board to a power supply and load
is accomplished through banana-plug type connectors (refer
to Table 1).
Configuration of the evaluation board is accomplished
through the use of on-board jumpers (refer to Table 2).
Test points in the form of clip-on pegs are available to the user
for making measurements on the LM3423 evaluation board.
Jumper Designation
J4A, J4B
J1
J2
J3
J5
J6
Connector Designation
Test Point Designation
Function or Use
Enable (EN)
OPEN: Disables LM3423.
CLOSED: Enables LM3423.
Current Limit (IS)
OPEN: Disables MOSFET RDS(ON) current sensing "Q5".
CLOSED: Enables MOSFET RDS(ON) current sensing "Q5".
Current Limit (IS)
OPEN: Disables external sense resistor MOSFET current sensing
"Q5".
CLOSED: Enables external sense resistor MOSFET current
sensing "Q5".
Current Limit (IS): Must be used in conjunction with jumper J2.
OPEN: Enables sensing MOSFET switch current across sense
resistor "R6".
CLOSED: Disables sensing MOSFET switch current across sense
resistor "R6".
PWM Dimming
OPEN: Enables high-side PWM dimming.
CLOSED: Disables high-side PWM dimming.
Fault Timer (FLT)
OPEN: External capacitor programs fault condition time to set flag
(FLT).
CLOSED: Disables fault timer and flag (FLT).
LED+
GND
LED-
TP1
TP2
TP3
TP5
TP6
TP7
TP8
V
IN
TABLE 3. LM3423 Evaluation Board Test Points
TABLE 2. LM3423 Evaluation Board Jumpers
TABLE 1. LM3423 Eval Board Connectors
2
Test point for "LED-" connector (LED cathode).
Test point for "LED+" connector (LED anode).
Power supply (Negative) primary connection
Power supply (Positive) primary connection
Test point for "PWM Dimming" input signal.
Test point for regulated output voltage.
Connect to cathode of LED.
Connect to anode of LED.
Test point for L-RDY pin.
Test point for nDIM pin.
Test point for IS pin.
Function or Use
Function or Use
Notes