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ADP1071-1 Datasheet(Fiches technique) 5 Page - Analog Devices

Numéro de pièce ADP1071-1
Description  Isolated Synchronous Flyback Controller
Télécharger  27 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
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Data Sheet
ADP1071-1/ADP1071-2
Rev. B | Page 5 of 27
Parameter
Symbol
Test Conditions/Comments
Min
Typ
Max
Unit
CURRENT-LIMIT SENSE
(PRIMARY)
CS Limit Threshold
VCS_LIM
Overcurrent sense limit threshold
120
mV
CS Leading Edge
Blanking Time
150
ns
Current Source di/dt for
Slope Compensation
Switching period (tS) = 1/fS
20
µA per tS
Overcurrent Protection
(OCP) Comparator
Delay
40
ns
Time in OCP Before
Entering Hiccup
Mode
1.5
ms
OCP Hiccup Time
See the Input/Output Current-Limit
Protection section
40
ms
FB PIN AND ERROR
AMPLIFIER
Feedback Accuracy
Voltage
VFB
TJ = −40°C to +85°C
−0.85%
+1.2
+0.85%
V
TJ = −40°C to +125°C
−1.25%
+1.2
+1.25%
V
Temperature
Coefficient
76
ppm/°C
FB Input Bias Current
−100
1
+100
nA
Transconductance
gm
230
250
270
µS
Output Current Clamp
Minimum
−57
µA
Maximum
43
µA
COMP Clamp Voltage
Maximum
2.52
V
Minimum
0.7
V
Open-Loop Gain
80
dB
Output Shunt Resistance
5
GΩ
Gain Bandwidth Product
1
MHz
PRECISION ENABLE
THRESHOLD
EN Threshold
VEN
EN rising
1.14
1.2
1.26
V
EN Hysteresis
VEN < 1.2 V
4
µA
VEN > 1.2 V
1
µA
EN Hysteresis Current
3
µA
LIGHT LOAD MODE
(ADP1071-1 ONLY)
LLM Current Source
Resistor from MODE to AGND1
5.5
6.5
7.5
µA
TEMPERATURE
Thermal Shutdown
155
°C
Hysteresis
−15
°C
SOFT START
Open Loop Soft Start
Time on Primary
tSS1
GATE resistor = 10 kΩ
16 × 775
tS
GATE resistor = 22 kΩ
64 × 775
tS
GATE resistor = 47 kΩ
256 × 775
tS
GATE resistor = 100 kΩ
4 × 775
tS
SS2 Current Source
During startup
20
µA
SS2 Discharging
Current
During a fault condition or soft stop
30
µA




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