STCF03 datasheet(11/35 Pages) STMICROELECTRONICS

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Electrical characteristics

STCF03

11/35

Electrical characteristics

Table 6. Electrical characteristics

(TJ = 25°C, VI = 3.6 V, 2xCI = 10 µF, CO = 1 µF, L = 4.7 µH, RFL = 0.27 Ω RTR = 1.8 Ω, RX = 15 KΩ,

Typ. values @25°C, unless otherwise specified).

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Input operation supply voltage

2.7

5.5

VPW_ON

RESET

Power ON reset threshold

VI rising

2.3

Output current adjustment

range IFLASH

FLASH MODE for VI = 2.7 V to 5.5 V

(STCF03PNR)

800

FLASH MODE for VI = 2.7 V to 3.3 V

(STCF03TBR)

600

FLASH MODE for VI=3.3 V to 5.5 V

(STCF03TBR)

800

Output current adjustment

range ITORCH

Torch mode VI = 2.7 V to 5.5 V

200

Auxiliary LED output current

adjustment range IAUXLED

Ready mode, VI = 3.3 V to 5.5 V

Regulated voltage range

2.5

5.3

FB1

Feedback voltage

Torch mode

250

FB2

Feedback voltage

Flash mode

250

ΔIO

Output current tolerance

Flash mode, IO = 160 mV/RFL

-10

RON_

FB1-FB2 ON resistance

Torch mode, IO = 200 mA

Quiescent current in

SHUTDOWN mode

NTC_ON=0

µA

NTC_ON=1

Quiescent current in ready -

mode

1.8

Frequency

VI = 2.7 V

1.8

MHz

Efficiency of the chip itself

VI = 3.2 to 4.2 V, Flash Mode,

IO = 800 mA

Efficiency of the whole

application

VI = 3.2 to 4.2 V, Flash Mode,

IO = 800 mA, VO=VfLED_max + VFB2 =

5.02 V

See the typical application schematic

It is included losses of inductor and

sensing resistor

OVP

Output over voltage protection VI = 5.5 V, No Load

5.3

OVHYST Over voltage hysteresis

VI = 5.5 V, No Load

0.3

OTP

Over temperature protection

VI = 5.5 V

140

°C

OTHYST Over temperature hysteresis

VI = 5.5 V

°C

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