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ML4821CS Folha de dados(PDF) 8 Page - Micro Linear Corporation

Nome de Peças ML4821CS
Descrição Electrónicos  Power Factor Controller
Download  12 Pages
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Fabricante Electrônico  MICRO-LINEAR [Micro Linear Corporation]
Página de início  http://www.microlinear.com
Logo MICRO-LINEAR - Micro Linear Corporation

ML4821CS Folha de dados(HTML) 8 Page - Micro Linear Corporation

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ML4821
Micro Linear
ENABLE
VREF
+
+
15
16
INTERNAL
BIAS
4.4V
LOGIC
POWER
VREF
9V
VCC
500
0
0
100
300
400
500
SINE INPUT CURRENT (µA)
200
100
200
300
400
1.0
1.5
2.5
3.5
4.5
5.5
RT = 5kΩ
VRMS = 3V
Figure 8. Under-Voltage Lockout Block Diagram.
Figure 7. Gain Modulator Linearity.
VCC = 15V
TA = –55°C
TA = 25°C
TA = 125°C
0
–4.0
–8.0
–12
–16
–20
–24
0
20
40
60
80
100
120
IREF, REFERENCE SOURCE CURRENT (mA)
40
10
0
010
20
30
VCC SUPPLY VOLTAGE (V)
TA = 25°C
20
30
Figure 9. Total Supply Current vs. Supply Voltage.
Figure 10. Reference Load Regulation.
UNDER VOLTAGE LOCKOUT,
OVP AND CURRENT LIMIT
On power-up the ML4821 remains in the UVLO
condition; output low and quiescent current low. The IC
becomes operational when VCC reaches 16V. When VCC
drops below 9V, the UVLO condition is imposed. During
the UVLO condition, the VREF pin is “off”, making it
usable as a “flag” for starting up a down-stream PWM
converter.
OVP, SHUTDOWN, AND IC BIAS
When the input to the OVP comparator exceeds VREF, the
output of the ML4821 is inhibited. The OVP input also
functions as a “sleep” input, putting the IC into the low
quiescent UVLO state when the OVP pin is pulled below
0.7V.


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