LM3424MH/NOPB National Semiconductor, LM3424MH/NOPB Datasheet - Page 30

• Manufacturer Part Number: LM3424MH/NOPB
• Description: IC LED DVR BUCK/BOOST 20-TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: High Power, Constant Currentr

Specifications of LM3424MH/NOPB

• Constant Current: Yes
• Topology: Flyback, PWM, SEPIC, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: Automotive
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 2MHz
• Voltage - Supply: 4.5 V ~ 75 V
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• Efficiency: 96%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: LM3424MH

www.national.com
Design Example
DESIGN #1 - BUCK-BOOST Application
SPECIFICATIONS
N = 6
V
r
V
V
V
f
V
I
Δi
SW
LED
LED
LED
IN
IN-MIN
IN-MAX
SNS
L-PP
= 24V
= 500 kHz
= 1A
= 325 mΩ
= 3.5V
= 100 mV
= 700 mA
= 10V
= 70V
30
Δi
Δv
I
V
V
V
V
T
T
t
LIM
TSU
TURN-ON
HYS
TURN-OFF
HYSO
BK
END
LED-PP
IN-PP
= 6A
= 70°C
= 30 ms
= 120°C
= 3V
= 10V
= 100 mV
= 12 mA
= 10V
= 40V
300857i1