LM3424MH/NOPB National Semiconductor, LM3424MH/NOPB Datasheet - Page 9

• 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

R
REF1
R
GAIN
Ideal Thermal Foldback - Varied Slope
= R
= 10 kΩ; V
REF2
I
TF
vs. Junction Temperature
= 49.9 kΩ; R
TSENSE
NTC-BK
= 0.5V; V
= R
TREF
BIAS
= 1.5V
= 43.2 kΩ
30085702
300857k4
9
Ideal Thermal Foldback - Varied Breakpoint
R
REF1
= R
REF2
= 49.9 kΩ; R
f
SW
vs. R
T
GAIN
= 10 kΩ
30085705
300857k5
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