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PDF UA7527 Data sheet ( Hoja de datos )
| Número de pieza | UA7527 | |
| Descripción | POWER FACTOR CONTROLLER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
UA7527
Preliminary
LINEAR INTEGRATED CIRCUIT
POWER FACTOR CONTROLLER
DESCRIPTION
The UTC UA7527 is a simple and high performance active power
factor corrective controller for boost PFC application which operates in
the critical conduction mode. The UTC UA7527 is optimized for
electronic ballasts, low power and high density power supplies which
require minimum board area reduced component count and low power
dissipation. Internal R/C filter eliminates the need for an external R/C
filter. Special circuitry has also been added to prevent no load
runaway conditions. The output drive clamping circuit limits the
overshoot of the power MOSFET gate drive despite the supply
voltage. This greatly enhances the system reliability.
FEATURES
* Internal Start-up Timer
* Very Precise Adjustable Output Over Voltage Protection
* Zero Current Detector
* Quadrant Multiplier
* Internal R/C Filter Eliminates the Need for an External R/C Filter
* Trimmed 1.5% Internal Band Gap Reference
* Under Voltage Lockout with 3V of Hysteresis
* Totem Pole Output With High State Clamp
* Low Start-up and Operating Current
ORDERING INFORMATION
Ordering Number
UA7527G-S08-R
Package
SOP-8
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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UA7527
Preliminary
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
SYMBOL TEST CONDITIONS MIN
CURRENT SENSE SECTION
Input Offset Voltage (Note 8)
Input Bias Current
Current Sense Delay to Output
VIO(CS)
IB(CS)
tD(CS)
VM1=0V, VM2 = 2.2V
0V ≤ VCS ≤ 1.7V
(Note 11)
-10
-1
ZERO CURRENT DETECT SECTION
Input Voltage Threshold
Detect Hysteresis
Input Low Clamp Voltage
Input High Clamp Voltage
Input Bias Current
Input High/Low Clamp Diode Current
VTH(DET) VDET Increasing
HY(DET)
VCLAMP IDET = -100uA
V CLAMP) IDET = 3mA
IB(DET) 1V ≤ VDET ≤ 5V
I CLAMP(D) (Note 12)
1.7
0.2
0.45
6.5
-1
OUTPUT SECTION
Output Voltage
High
Low
Rising Time (Note 13)
Falling Time (Note 14)
Maximum Output Voltage
Output Voltage with UVLO Activated
VOH IO = -10mA
VOL IO = 10mA
tR CI = 1nF
TF CI = 1nF
VOMAX(O) VCC = 20V, IO = 100uA
VOMIN(O) VCC = 5V , IO = 100uA
10.5
12
RESTART TIMER SECTION
Restart Time Delay
tD(RST) VM1 = 1V, VM2 = 3.5V
OVER VOLTAGE PROTECTION SECTION
Soft OVP Detecting Current
ISOVP
25
Dynamic OVP Detecting Current
IDOVP
35
Static OVP Threshold Voltage
VOVP VINV = 2.7V
2.1
Note: 1~14.These parameters, although guaranteed, are not 100% tested in production.
Multiplier
Gain:
K=
Pin4_Threshold
VM1 VM2 VREF
……(VM1=Vpin3,
VM2=Vpin2)
TYP
3
-0.1
200
2
0.5
0.75
7.2
-0.1
11
0.8
130
50
14
150
30
40
2.25
MAX UNIT
10 mV
1 uA
500 ns
2.3 V
0.8 V
1V
7.9 V
1 uA
±3 mA
V
1V
200 ns
120 ns
16 V
1V
us
35 uA
45 uA
2.4 V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet UA7527.PDF ] | |
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