LM3554TME/NOPB National Semiconductor, LM3554TME/NOPB Datasheet - Page 14

• Manufacturer Part Number: LM3554TME/NOPB
• Description: IC LED DVR PHOTO FLASH 16-USMD
• Manufacturer: National Semiconductor
• Type: Photo Flash LED (I²C Interface)r

Specifications of LM3554TME/NOPB

• Constant Current: Yes
• Topology: High Side, Step-Up (Boost)
• Number Of Outputs: 2
• Internal Driver: Yes
• Type - Primary: Flash/Torch
• Type - Secondary: White LED
• Frequency: 2MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 5V
• Mounting Type: Surface Mount
• Package / Case: 16-MicroSMD
• Operating Temperature: -30°C ~ 85°C
• Current - Output / Channel: 600mA
• Internal Switch(s): Yes
• Efficiency: 90%
• Led Driver Application: LED Backlighting, Portable Electronics
• No. Of Outputs: 2
• Output Current: 1.2A
• Input Voltage: 2.7V To 5.5V
• Dimming Control Type: I2C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM3554TMETR

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Channel 1: V
Channel 4: I
Channel 2: IL (1A/div)
Channel 3: ENVM (5V/div)
Time Base: (100µs/div)
Channel 3: V
Channel 4: I
Time Base: (100ms/div)
LED
LED
OUT
IN
(1V/div)
(500mA/div)
(500mA/div)
(2V/div)
Flash Pulse + V
Single LED, I
Single LED, I
V
IN
3.1V UVLO Setting
Monitor Response
LED
OUT
= 1.2A, V
LED
to Flash Pulse
= 1.2A
OUT
= 5V
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Channel 3: NTC Pin Voltage (500mV/div)
Channel 4: I
Time Base: (200ms/div)
Circuit of
LED
(500mA/div)
Figure 25
Single LED, I
NTC Mode Response
(R(T) = 100kΩ (@+25°C), R3 = 9kΩ)
LED
= 1.2A
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