L6668 datasheet(6/23 Pages) STMICROELECTRONICS

6 / 23 page

L6668

6/23

(1), (2)

Parameters in tracking each other

Figure 4. Typical System Block Diagram

VSSsat

Low saturation voltage

Duty cycle = 0

0.6

VSSclamp

High saturation voltage

SKIPADJ FUNCTION

Ibias

Input Bias Current

VSKIP = 0 to 4.5 V

-1

µA

VSKIP

Operating range

1.4

2.5

Hys

Hysteresis

Below VSKIP

VOFF

Shutdown threshold

Voltage falling

0.8

PFC_STOP FUNCTION

Ileak

High level leakage current

VPFC_STOP < 16V, VCOMP = 2V

µA

Low saturation level

IPFC_STOP = 1mA, VCOMP = 4V

0.1

Vth

Threshold for high level

VCOMP falling

(2)

2.1

2.2

2.3

Vth

Threshold for high level

VCOMP rising

(2)

2.55

2.7

2.85

GATE DRIVER

VOL

Output Low Voltage

Isink = 200 mA

1.0

VOH

Output High voltage

Isource = 5 mA, Vcc = 12V

9.8

10.3

Isourcepk

Peak source current

-0.8

Isinkpk

Peak sink current

0.8

Current Fall Time

Current Rise Time

VOclamp

Output clamp voltage

Isource = 5mA; Vcc = 20V

UVLO saturation

Vcc= 0 to Vccon, Isink= 2mA

1.1

Table 5. Electrical Characteristcs (continued)

(Tj = 0 to 105°C, Vcc=15V, Co=1nF; RT =13.3k , CT =1nF; unless otherwise specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Vinac

Voutdc

L6561/2

L6563

PWM is turned off in case of PFC's

anomalous operation, for safety

PFC can be turned off at light

load to ease compliance with

energy saving regulations.

L6668

PFC PRE-REGULATOR

DC-DC CONVERTER

Vinac

Voutdc

L6561/2

L6563

PWM is turned off in case of PFC's

anomalous operation, for safety

PFC can be turned off at light

load to ease compliance with

energy saving regulations.

L6668

PFC PRE-REGULATOR

DC-DC CONVERTER

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