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TEA2260 数据表(PDF) 4 Page - STMicroelectronics

部件名 TEA2260
功能描述  SWITCH MODE POWER SUPPLY CONTROLLER
Download  9 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TEA2260 数据表(HTML) 4 Page - STMicroelectronics

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RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min.
Typ.
Max.
Unit
VCC
Power Supply
VCC stop
12
VCC max
V
IOUT+
Positive Output Current (source current)
1.2
A
IOUT-
Negative Output Current (sink current)
2.0
A
IOUT+
Average Positive Output Current
0.6
A
IOUT-
Average Negative Output Current
0.6
A
Foper
Operating Frequency
10
100
kHz
VIN
Input Pulses Amplitude (Pin 2)
1.5
2.5
4.5
V
ROSC
Oscillator Resistor Range
20
150
k
COSC
Oscillator Capacitor Range
0.47
4.7
nF
C1
Soft-starting Capacitor Range
0.047
1
µF
C2
Overload Integration Capacitor
0.047
1
µF
C2/C1
Ratio C2/C1 (C2 must be
≥ C1)
1
Tamb
Operating Ambient Temperature
-20
70
oC
ELECTRICAL CHARACTERISTICS (Tamb = 25
oC, VCC =12V, unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
POWER SUPPLY
VCC(start)
Starting Voltage (VCC increasing)
9.3
10.3
11.3
V
VCC(stop)
Stopping Voltage (VCC decreasing)
6.4
7.4
8.4
V
Hyst VCC
Hysteresis (VCC(start) - VCC(Stop))
2.4
2.9
V
ICC(start)
Starting Current (VCC = 9V)
0.7
1.4
mA
ICC
Supply Current (VCC = 12V)
7.5
15
mA
VCC(max)
Overvoltage Threshold on VCC
15
15.7
V
ICC(over)
Supply Current after Overvoltage Detection (VCC = 17V)
26
35
42
mA
OSCILLATOR / PWM SECTION
Delta F
F
Accuracy (ROSC = 68k
Ω, COSC = 1nF)
10
%
tON max
Maximum Duty Cycle in Primary Regulation Mode
50
60
70
%
ERROR AMPLIFIER SECTION
AVO
Open Loop Gain
75
dB
Fug
Unity Gain Frequency
550
kHz
ISC
Short Circuit Output Current (Pin 7 connected to ground)
2
mA
IBE
E Input Bias Current (Pin 6)
0.08
µA
VREF
Internal Voltage Reference (connected to error amplifier input and
not directly accessible)
2.34
2.49
2.64
V
INPUT SECTION
VIN
IN Input Threshold (Pin 2)
0.6
0.85
1.2
V
VIS
IS Input Threshold (Pin 1)
0.15
V
IBIN
IN Input Bias Current
0.3
µA
IBIS
IS Input Bias Current
0.4
µA
CURRENT LIMITATION SECTION
VIM1
First Current Limitation Threshold
558
600
642
mV
VIM2
Second Current Limitation Threshold
837
900
963
mV
∆VIM
Thresholds Difference VIM2 - VIM1
300
mV
VC2
Lock-out Threshold on Pin C2
2.25
2.55
2.85
V
IDC2
Capacitor C2 Discharge Current
10
µA
ICC2
Capacitor C2 Charge Current
45
µA
IBI(max)
Maximum Input Bias Current (Pin 3)
0.2
µA
TEA2260 - TEA2261
4/9


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