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UC3863NTR View Datasheet(PDF) - Texas Instruments

Part NameUC3863NTR TI
Texas Instruments TI
DescriptionResonant-Mode Power Supply Controllers
UC3863NTR Datasheet PDF : 9 Pages
1 2 3 4 5 6 7 8 9
UC1861-1868
UC2861-2868
UC3861-3868
ELECTRICAL CHARACTERISTICS Unless otherwise stated, all specifications apply for –55°CTA125°C for the
UC186x, –25°CTA85°C for the UC286x, and 0°CTA70°C for the UC386x, VCC=12V, CVCO=1nF, Range=7.15k, RMIN=86.6k,
C=200pF, R=4.02k, and Csr=0.1µF. TA=TJ .
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
5V Generator
Output Voltage
12V Vcc 20V, –10mA IO 0mA
4.8 5.0 5.2 V
Short Circuit Current
VO = 0V
–150
–15 mA
Soft-Reference
Restart Delay Current
V = 2V
10 20 35 µA
Soft Start Current
V = 2V
–650 –500 –350 µA
Reference Voltage
TJ = 25°C, IO = 0A
4.95 5.00 5.05 V
12V VCC 20V, –200µA IO 200µA
4.85
5.15 V
Line Regulation
12V VCC 20V
2
20 mV
Load Regulation
–200µA IO 200µA
10 30 mV
Error Amplifier (Note 3)
Input Offset Voltage
VCM = 5V, Vo = 2V, IO = 0A
–10
10 mV
Input Bias Current
VCM = 0V
–2.0 –0.3
µA
Voltage Gain
Vcm = 5V, 0.5V VO 3.7V, IO = 0A
70 100
dB
Power Supply Rejection Ratio
Vcm = 5V, VO = 2V, 12V VCC 20V
70 100
dB
Error Amplifier (Note 3) (cont.)
Common Mode Rejection Ratio 0V Vcm 6V, VO = 2V
65 100
dB
VOUT Low
VID = –100mV, IO = 200µA
0.17 0.25 V
VOUT High
VID = 100mV, IO = –200µA
3.9 4.2
V
Unity Gain Bandwidth
(Note 4)
0.5 0.8
MHz
Voltage Controlled Oscillator
Maximum Frequency
VID (Error Amp) = 100mV, TJ = 25°C
450 500 550 kHz
VID (Error Amp) = 100mV
425
575 kHz
Minimum Frequency
VID (Error Amp) = –100mV, TJ = 25°C
45 50 55 kHz
VID (Error Amp) = –100mV
42
58 kHz
One Shot
Zero Comparator Vth
0.45 0.50 0.55 V
Propagation Delay
(Note 4)
120 200 ns
Maximum Pulse Width
VZERO = 1V
850 1000 1150 ns
Maximum to Minimum Pulse
VZERO = 0V UCx861 – UCx864
2.5
4
5.5
Width Ratio
VZERO = 0V UCx865 – UCx868. –55°C to +85°C
4
5.5
7
VZERO = 0V UCx865 – UCx868, +125°C
3.8 5.5
7
Output Stage
Rise and Fall Time
CLOAD = 1nF (Note 4)
25 45 ns
Output Low Saturation
IO = 20mA
0.2 0.5 V
IO = 200mA
0.5 2.2 V
Output High Saturation
IO = –200mA, down from Vcc
1.7 2.5 V
UVLO Low Saturation
IO = 20mA
0.8 1.5 V
Fault Comparator
Fault Comparator Vth
2.85 3.00 3.15 V
Delay to Output
(Note 4) (Note 5)
100 200 ns
3
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