LM3554 datasheet(38/47 Pages) TI1

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LM3554

SNVS549C – JUNE 2009 – REVISED FEBRUARY 2016

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Time Base: 20 µs/div

IFLASH = 1.2 A

ITORCH = 180 mA

Ch 1: VOUT (2 V/div)

Ch 2: IL (1 A/div)

Single LED

Ch 4: ILED (500 mA/div)

Ch 3: TX1 (5 V/div)

Figure 57. TX1 Interrupt Operation, TX1 Falling

Time Base: 400 µs/div

IFLASH = 1.2 A

Single LED

Ch 3: VIN (5 V/div)

Ch 2: IL (1 A/div)

Ch 4: ILED (500 mA/div)

Figure 58. Line Transient (LED Mode)

Time Base: 40 µs/div

VIN = 3.6 V

VOUT = 5 V

Ch 1: VOUT (500 mV/div)

Ch 2: IL (500 mA/div)

Ch 4: IOUT (500 mA/div)

Figure 59. Load Transient (Voltage Output Mode)

Time Base: 200 µs/div

VOUT = 5 V

IOUT = 500 mA

Ch 1: VOUT = (5 V/div)

Ch 2: IL + IIN (500 mA/div)

Ch 3 (Top Trace): VIN (1 V/div)

Figure 60. Line Transient (Voltage Output Mode)

Time Base: 20 µs/div

ILED = 1.2 A

Single LED

Ch 1: VOUT (2 V/div)

Ch 3: HWEN (5 V/div)

Ch 4: ILED (500 mA/div)

Figure 61. Flash Pulse to HWEN Low

Time Base: 100 µs/div

VOUT = 5 V

ILED = 1.2 A

Ch 1: VOUT (2 V/div)

Ch 2: IL (1 A/div)

Single LED

Ch 4: ILED (500 mA/div)

Ch 3: ENVM (5 V/div)

Figure 62. Flash Pulse to Flash Pulse + VOUT Mode

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