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UC1862N Datasheet(Scheda tecnica) 3 Page - TI store

Numero della parte UC1862N
Dettagli  Resonant-Mode Power Supply Controllers
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3
UC1861-1868
UC2861-2868
UC3861-3868
ELECTRICAL CHARACTERISTICS Unless otherwise stated, all specifications apply for –55
°C≤TA≤125°C for the
UC186x, –25
°C≤TA≤85°C for the UC286x, and 0°C≤TA≤70°C for the UC386x, VCC=12V, CVCO=1nF, Range=7.15k, RMIN=86.6k,
C=200pF, R=4.02k, and Csr=0.1
µF. 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
–200
µA ≤ IO ≤ 200µA10
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 = 200
µA
0.17
0.25
V
VOUT High
VID = 100mV, IO = –200
µA
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




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