LM3554TME/NOPB National Semiconductor, LM3554TME/NOPB Datasheet - Page 11

• 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

Channel 1: V
Channel 4: I
Channel 2: I
Channel 3: STROBE (5V/div)
Time Base: (100µs/div)
(Torch Brightness Register bits[7:6] = 01)
(Torch Brightness Register bits[7:6] = 11)
LED
L
OUT
(500mA/div)
(500mA/div)
Indicator Current vs V
Indicator Current vs V
(2V/div)
Startup into Flash Mode
I
FLASH
Single LED
= 1.2A
IN
IN
, V
, V
LEDI
LEDI
= 2V
= 2V
30042091
30042093
30042060
11
Channel 1: V
Channel 4: I
Channel 2: I
Channel 3: TX1 (5V/div)
Time Base: (100µs/div)
Single LED, Hardware Torch Mode, 90mA Torch Setting
(Torch Brightness Register bits[7:6] = 10)
LED
L
OUT
(500mA/div)
NTC Comparator Trip Threshold vs V
(100mA/div)
Indicator Current vs V
(2V/div)
Startup into Torch Mode
I
TORCH
= 180mA
IN
, V
LEDI
= 2V
30042092
30042098
30042061
IN
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