LED7708 datasheet(14/53 Pages) STMICROELECTRONICS

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Electrical characteristics

LED7708

14/53

Doc ID 022698 Rev 1

FSW synchronization input

low level

0.5

FSW synchronization input

high level

2.2

SYNC output duty cycle

FSW connected to LDO3

SYNC output high level

ISYNC=1 mA

VLDO3

-0.3 V

SYNC output low level

ISYNC=-1 mA

0.4

Adjustable power MOSFET

current sensing voltage

RCLIM=100 kΩ

100

RCLIM=300 kΩ

300

Power consumption

IVIN1

Shutdown current (SI off,

LED drivers off, SMPS off,

LDOs off)

LREN low, VSI low

µA

IVIN2

Shutdown current (SI active,

LED drivers off, SMPS off,

LDOs on)

LREN floating VSI to LDO3

DEN=0

300

450

IVIN3

Quiescent current (LED

drivers off, boost section not

switching)

LREN floating; VSI, FOSC

and ISETL to LDO3; DIN,

DCLK, LE, GSCK and GSSY

to GND; VCHx=2 V;

RISETH=60 kΩ

IVIN4

Operating current (serial

interface active, boost not

switching)

LREN floating VSI and FOSC

to LDO3, DIN and DCLK

toggling at 15 MHz, DOUT,

GSSY and GSCK floating, LE

to GND. VCHx=2 V,

RISETH=60 kΩ

IVSI1

Standby current (DIN, DCLK

and LE to SGND, LED

drivers off, SMPS off, LREN

floating)

VSI = 3.3 V

µA

VSI = 5.0 V

OV protection, output regulation

VFB,OVP

Overvoltage protection

reference threshold

VMIN tied to GND

1.275

1.30

1.325

VMIN to LDO3

1.105

1.13

1.155

RVMIN=220 kΩ

0.985

1.01

1.035

VMIN floating

0.765

0.8

0.815

VFB,OVP

OVP hysteresis

Table 6.

Electrical characteristics (continued)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

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