L4981A STMicroelectronics, L4981A Datasheet - Page 2

• Manufacturer Part Number: L4981A
• Description: IC PFC CTRLR AVERAGE CURR 20DIP
• Manufacturer: STMicroelectronics

Specifications of L4981A

• Mode: Average Current
• Frequency - Switching: 100kHz
• Current - Startup: 100µA
• Voltage - Supply: 14.5 V ~ 19.5V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Switching Frequency: 115 KHz
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• For Use With: 497-5523 - EVAL BOARD FOR L4981
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3634

L4981A - L4981B
put filter; both the operating frequency modes
working with an average current mode PWM con-
troller, maintaining sinusoidal line current without
slope compensation.
Besides power MOSFET gate driver, precise volt-
age reference (externally available), error ampli-
fier, undervoltage lockout, current sense and the
ABSOLUTE MAXIMUM RATINGS
(*) Maximum package power dissipation limits must be observed.
PIN CONNECTIONS (Top views)
2/16
I
Symbol
FREQ-MOD
V
V
V
V
V
I
I
CA-OUT
VA-OUT
V
V
GDRV
COSC
P
T
GDRV
ROSC
SYNC
T
I
AC
IPK
CC
stg
tot
op
11, 18
Pin
19
20
13
17
18
16
16
4
5
2
.
L4981A
Supply Voltage (I
Gate driv. output peak current (t = 1 s)
Gate driv. output voltage t = 0.1 s
Voltages at pins 3, 14, 7, 6, 12, 15
Error Amplifier Voltage
AC Input Current
Voltages at pin 8, 9
Current Amplifier Volt. (Isource = -20mA; Isink = 20mA)
Voltage at pin 17
Voltage at pin 11, 18
Input Sink Current
Frequency Modulation Sink Current (L4981B)
Sync. Voltage (L4981A)
Voltage at pin 2
Voltage at Pin 2 t = 1 s
Power Dissipation at T
Power Dissipation at T
Operating Ambient Temperature
StorageTemperature
CC
50mA) (*)
Parameter
amb
amb
= 70 C
= 70 C
soft start are included. To limit the number of the
external components, the device integrates pro-
tections as overvoltage and overcurrent. The
overcurrent level can be programmed using a
simple resistor for L4981A. For a better precision
and for L4981B an external divider must be used.
(DIP20)
(SO20)
SOURCE
SINK
L4981B
-0.3 to 8.5
-0.3 to 8.5
-0.3 to 5.5
-40 to 125
-55 to 150
-0.3 to 9
-0.5 to 7
-0.3 to 3
-0.3 to 7
-0.3 to 7
selflimit
Value
1.5
0.6
15
-1
-2
2
5
5
1
Unit
mA
mA
mA
°C
°C
W
W
V
A
V
V
V
V
V
V
V
V
V
V