LM3501TLX-21/NOPB National Semiconductor, LM3501TLX-21/NOPB Datasheet - Page 10

• Manufacturer Part Number: LM3501TLX-21/NOPB
• Description: IC LED DRVR WHT BCKLT 8-USMD
• Manufacturer: National Semiconductor
• Type: Backlight, White LEDr

Specifications of LM3501TLX-21/NOPB

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 850kHz ~ 1.15MHz
• Voltage - Supply: 2.7 V ~ 7 V
• Voltage - Output: 19.5 V ~ 20.5 V
• Mounting Type: Surface Mount
• Package / Case: 8-MicroSMD
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 640mA
• Internal Switch(s): Yes
• Efficiency: 85%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM3501TLX-21

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Typical Performance Characteristics
3 LEDs, R
1) SHDN, 1 V/div, DC
2) I
3) I
T = 100 µs/div
L
LED
, 100 mA/div, DC
, 20 mA/div, DC
LED
= 22Ω, V
PMOS R
IN
Start-Up (LM3501-16)
= 3.0V, CNTRL = 2.7V
DSON
vs. Temperature
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10
(Continued)
3 LEDs, R
1) SW, 10 V/div, DC
3) I
4) V
T = 250 ns/div
LM3501-16, 3 LEDs, R
1) SHDN, 1 V/div, DC
2) I
3) I
4) V
T = 1 ms/div
L
L
LED
IN
OUT
, 100 mA/div, DC
, 100 mA/div, DC
, 100 mV/div, AC
, 20 mA/div, DC
, 10 V/div, DC
LED
SHDN Pin Duty Cycle Control Waveforms
= 22Ω, V
LED
IN
= 3.0V, CNTRL = 2.7V
Typical V
= 22Ω, V
IN
= 3.0V, SHDN frequency = 200 Hz
IN
Ripple
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