L4984DTR datasheet(11/35 Pages) STMICROELECTRONICS

Part #	L4984DTR

Description	CCM PFC controller

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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DocID024474 Rev 1

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L4984D

Electrical characteristics

ΔV

Dropout VMULTpk-VVFF

Before turn-on

800

mV

After turn-on

20

ΔVVFF

Line drop detection threshold

Below peak value

25

60

100

mV

ΔVVFF

Line drop detection threshold

Below peak value Tj = 0 to 100 °C

40

70

100

mV

RDISCH

Internal discharge resistor

5

10

20

k

Ω

VDIS

Disable threshold

(1) Voltage falling

0.745

0.8

0.855

V

VEN

Enable threshold

(1) Voltage rising

0.845

0.88

0.915

V

Fixed-off-time modulator

ITIMER

Programming current

VMULT = 1 V

142

153

163

µA

TOFF

Programmed off-time

VMULT = 1 V

2.88

3.09

3.30

µs

RDIS

Discharge resistance

35

60

120

W

CTIMER

Timing capacitor range

0.1

2.2

nF

TOFF_pk

Programming range

On the peak of VMULT

1.45

50

µs

Soft-start

TSS

Activation time

300

µs

VMULTx

Pull-up voltage

10 k

Ω from MULT to GND

4.1

V

Gate driver

VOL

Output low voltage

Isink = 100 mA

0.6

1.2

V

VOH

Output high voltage

Isource = 5 mA

9.8

10.3

V

Isrcpk

Peak source current

-0.6

A

Isnkpk

Peak sink current

0.8

A

tf

Voltage fall time

30

60

ns

tr

Voltage rise time

45

110

ns

VOclamp

Output clamp voltage

Isource = 5 mA; Vcc = 20 V

10

12

15

V

UVLO saturation

VCC = 0 to VCCon, Isink = 2 mA

1.1

V

1. Parameters tracking each other.

2. The multiplier output is given by:

Table 5. Electrical characteristics (continued)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

()

2

5

2

V

CS _O fst

VFF

V

.

COMP

V

MULT

V

K

cs

V

M

−

⋅

+

=

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