MAX1577YETA 查看數據表（PDF） - Maxim Integrated

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MAX1577YETA

1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights

Maxim Integrated 

1.2A White LED Regulating Charge Pump for

Camera Flashes and Movie Lights

ELECTRICAL CHARACTERISTICS (continued)

(VIN = 3.6V, circuit of Figure 2, EN1 = EN2 = IN, RCS = 60Ω, CIN = 4.7µF, C1 = 2.2µF, COUT = 10µF, TA = -40°C to +85°C, unless

otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

EN_ Logic-High Voltage

EN_ Logic-Low Voltage

Logic Input Current

Thermal-Shutdown Threshold

Thermal-Shutdown Hysteresis

VIN = 4.2V to 5.5V

VIN = 2.7V to 4.2V

VIN = 2.7V to 5.5V

VEN_ = 0V or 5.5V

TJ rising

TA = +25°C

TA = +85°C

1.6

V

1.4

0.4

V

0.02

1

µA

0.02

+160

°C

20

°C

Note 1: Limits are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design.

Typical Operating Characteristics

(VIN = 3.6V, circuit of Figure 2, RCS = 0.27Ω, Luxeon LXCL-PWF1 LED, TA = +25°C, unless otherwise noted.)

LED CURRENT vs. SUPPLY VOLTAGE

1200

1000

1100mA AT 3.78VF

800

600

370mA AT 3.33VF

400

200

RCS = 0.27Ω

0

220mA AT 3.15VF

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

SUPPLY VOLTAGE (V)

EFFICIENCY vs. SUPPLY VOLTAGE

100

90

RCS = 0.27Ω

80

70

60

50

40

220mA AT 3.15VF

30

370mA AT 3.33VF

20

1100mA AT 3.78VF

10

0

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

SUPPLY VOLTAGE (V)

BATTERY CURRENT vs. SUPPLY VOLTAGE

2500

RCS = 0.27Ω

2000

1100mA AT 3.78VF

1500

370mA AT 3.33VF

1000

220mA AT 3.15VF

500

0

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

SUPPLY VOLTAGE (V)

LED CURRENT vs. SUPPLY VOLTAGE

900

800

700

600

770mA AT 3.66VF

500

400

250mA AT 3.21VF

300

200

100

RCS = 0.39Ω

0

150mA AT 3.06VF

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

SUPPLY VOLTAGE (V)

EFFICIENCY vs. SUPPLY VOLTAGE

100

770mA AT 3.66VF

90

80

70

60

50

40

30 150mA AT 3.06VF

20

250mA AT 3.21VF

10

RCS = 0.39Ω

0

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

SUPPLY VOLTAGE (V)

BATTERY CURRENT vs. SUPPLY VOLTAGE

1800

RCS = 0.39Ω

1600

1400

1200

770mA AT 3.66VF

1000

800 250mA AT 3.21VF

600

150mA AT 3.06VF

400

200

0

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

SUPPLY VOLTAGE (V)

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