STLD20CP1 datasheet(7/19 Pages) STMICROELECTRONICS

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STLD20CP1

Electrical characteristics

7/19

Electrical characteristics

Table 7.

Electrical characteristics for STLD20CP1 (TJ = -40 °C to 85 °C, VI = 3.4 V, CI = 2.2 µF,

CO1,2 = 2.2 µF, VO_SU = 15 V, VO_CP = 4 V, CCP = 1 µF, CFB_SU = 100 pF, L = 3.3 µH, DM1 =

DM2 = 1.6 V, typ. values @ 25 °C, unless otherwise specified)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Supply section

Operating input voltage

2.8

VUVLO_H

Under-voltage lockout

HIGH

2.7

VUVLO_L

Under-voltage lockout

LOW

2.2

Supply current

ILED = 50mA, TF = 0

700

µA

Standby current

DM1= DM2 = TF = SEL = 0

µA

Dynamic performance

Efficiency step-up

ILED = 20mA, VI = 2.8V to 6.0V

(1)

Backlight section, step-up

V_OVP

Over-voltage protection

16.5

VFB_SU

Feedback voltage

465

490

515

IFB_SU

Feedback leakage current VFB_SU = 1V

0.1

0.5

µA

fSW

Frequency switching

1.3

MHz

Backlight section, step-up

RDSON

P_SW

Step-up switch resistance

TJ = 25°C, ISW = 100mA

0.8

ILK_SW

P_SW leakage current

VSW = 17V, DM1= DM2 = 0V

0.1

0.5

µA

IPK

Peak inductor current

1,2

ΔVRipple Output ripple step-up

ILED = 50mA

mVpp

ILED MAX Max LED current

VFB_SU/R_LED, R_LED = 10Ω

ILED (LINE) Static line regulation

VI = 3.0V to 4.2V @ TJ = 25°C

(1)

-5

FB step

STEP feedback voltage

R_LED = 10

Digital control section

V-DM1H

V-DM2H

V-TFH

V-SELH

High voltage threshold

VI = 2.8V to 6V

1.4

I-DM1H

I-DM1H leakage current

V-DM1H = 6V

0.1

0.5

µA

I-DM2H

I-DM2H leakage current

V-DM2H = 6V

0.1

0.5

µA

I-TFH

I-TFH leakage current

V-TFH = 6V

0.1

0.5

µA

I-SELH

I-SELH leakage current

V-SELH = 6V

0.1

0.5

µA

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