LM3421MH/NOPB National Semiconductor, LM3421MH/NOPB Datasheet - Page 7

• Manufacturer Part Number: LM3421MH/NOPB
• Description: IC LED DRVR HP CONS CURR 16TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: High Power, Constant Currentr

Specifications of LM3421MH/NOPB

• Constant Current: Yes
• Topology: 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
• Voltage - Output: 3 V ~ 72 V
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 1A
• Internal Switch(s): No
• Efficiency: 95%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM3421MH/NOPB; LM3421MH

Typical Performance Characteristics
V
Boost LED Current vs. Input Voltage
O
Boost Efficiency vs. Input Voltage
= 21V (6 LEDs); V
V
V
O
O
= 32V (9 LEDs)
= 32V (9 LEDs)
Analog Dimming
IN
= 24V
(Note
(Note
(Note
9)
9)
300673b6
8)
300673b8
300673b9
7
T
A
=+25°C and V
Buck-Boost LED Current vs. Input Voltage
Buck-Boost Efficiency vs. Input Voltage
V
O
= 32V (9 LEDs); V
V
V
IN
O
O
= 14V unless otherwise specified
= 21V (6 LEDs)
= 21V (6 LEDs)
PWM Dimming
IN
= 24V
(Note
(Note
(Note
8)
8)
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300673c0
9)
300673b7
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