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PDF L4984DTR Data sheet ( Hoja de datos )
| Número de pieza | L4984DTR | |
| Descripción | CCM PFC controller | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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SSOP10
L4984D
CCM PFC controller
Datasheet - production data
Table 1. Device summary
Order code
Package
L4984D
L4984DTR
SSOP10
Packaging
Tube
Tape and reel
Features
• Line-modulated fixed-off-time (LM-FOT)
control of CCM-operated PFC pre-regulators
• Proprietary LM-FOT modulator for nearly fixed-
frequency operation
• Proprietary multiplier design for minimum THD
of AC input current
• Fast “bi-directional” input voltage feedforward
(1/V2 correction)
• Accurate adjustable output overvoltage
protection
• Protection against feedback loop failure
(latched shutdown)
• Inductor saturation protection
• AC brownout detection
• Digital leading-edge blanking on current sense
• Soft-start
• 1% (at Tj = 25 °C) internal reference voltage
• - 600 / + 800 mA totem pole gate driver with
active pull-down during UVLO and voltage
clamp
• SSOP10 package
Applications
• PFC pre-regulators for:
– IEC61000-3-2 and JEIDA-MITI compliant
SMPS in excess of 1 KW
– Desktop PC, server, web server
April 2013
This is information on a product in full production.
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L4984D
2 Block diagram
Figure 1. Electrical diagram
Block diagram
…
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L4984D
Electrical characteristics
Table 5. Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min Typ
ΔV Dropout VMULTpk-VVFF
ΔVVFF
ΔVVFF
RDISCH
VDIS
VEN
Line drop detection threshold
Line drop detection threshold
Internal discharge resistor
Disable threshold
Enable threshold
Fixed-off-time modulator
ITIMER
TOFF
RDIS
CTIMER
TOFF_pk
Soft-start
Programming current
Programmed off-time
Discharge resistance
Timing capacitor range
Programming range
TSS
VMULTx
Activation time
Pull-up voltage
Gate driver
VOL
VOH
Isrcpk
Isnkpk
tf
tr
VOclamp
Output low voltage
Output high voltage
Peak source current
Peak sink current
Voltage fall time
Voltage rise time
Output clamp voltage
UVLO saturation
1. Parameters tracking each other.
2. The multiplier output is given by:
Before turn-on
After turn-on
Below peak value
25
Below peak value Tj = 0 to 100 °C 40
(1) Voltage falling
(1) Voltage rising
5
0.745
0.845
VMULT = 1 V
VMULT = 1 V
On the peak of VMULT
142
2.88
35
0.1
1.45
10 kΩ from MULT to GND
Isink = 100 mA
Isource = 5 mA
9.8
-0.6
0.8
Isource = 5 mA; Vcc = 20 V
VCC = 0 to VCCon, Isink = 2 mA
10
60
70
10
0.8
0.88
153
3.09
60
300
4.1
0.6
10.3
30
45
12
Max
800
20
100
100
20
0.855
0.915
163
3.30
120
2.2
50
1.2
60
110
15
1.1
Unit
mV
mV
mV
kΩ
V
V
µA
µs
W
nF
µs
µs
V
V
V
A
A
ns
ns
V
V
( )Vcs
= VCS_Ofst
+
KM
⋅
VMULT
⋅
VCOMP
VV2FF
−2.5
DocID024474 Rev 1
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet L4984DTR.PDF ] | |
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