L4981B STMicroelectronics, L4981B Datasheet - Page 13

• Manufacturer Part Number: L4981B
• Description: IC PFC CTRLR AVERAGE CURR 20DIP
• Manufacturer: STMicroelectronics

Specifications of L4981B

• 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
• Supply Voltage Range: 12V To 19.5V
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +125°C
• Ic Generic Number: 4981
• Output Current Max: 300µA
• Rohs Compliant: Yes
• Input Voltage: 19.5V
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5337-5; L4981B

DEMO BOARD EVALUATION RESULTS
Table 2. Nominal Power range at 110Vac.
Table 3. Nominal Power range at 220Vac.
REFERENCE:
AN628 - DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR WITH THE L4981
110Vac
132Vac
176Vac
220Vac
264Vac
88Vac
V
V
mains
mains
CONTINUOUS MODE
366W
370W
372W
378W
381W
381W
P
P
out
out
404Vdc
406Vdc
407Vdc
410Vdc
412Vdc
412Vdc
V
V
out
out
397W
395W
394W
394W
395W
395W
P
P
in
in
2.2%
4.7%
6.4%
8.1%
THD
THD
5%
3%
0.998
0.999
0.999
0.997
0.993
0.987
PF
PF
L4981A - L4981B
.945
.959
.964
.964
Eff.
Eff.
.92
.94
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