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LTC3726 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC3726
Description  Secondary-Side Opto-Coupler Driver Ground-Referenced Opto-Coupler Drive
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3726 Datasheet(HTML) 3 Page - Linear Technology

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LT4430
3
4430fb
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, FB = VFB, COMP = 1V, unless otherwise noted (Note 3).
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT4430 is tested under pulsed load conditions such that TJ ≈ TA.
The LT4430E is guaranteed to meet specifications from 0°C to 125°C
junction temperature. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LT4430I is guaranteed
over the –40°C to 125°C operating junction temperature range, the
LT4430H is guaranteed over the –40°C to 150°C operating junction
temperature range and the LT4430MP is tested and guaranteed over the
–55°C to 150°C operating junction temperature range. High junction
temperatures degrade operating lifetimes; operating lifetime is derated
for junction temperatures greater than 125°C. Note that the maximum
ambient temperature consistent with these specifications is determined by
specific operating conditions in conjunction with board layout, the rated
package thermal impedance and other environmental factors.
Note 3: All currents into device pins are positive. All currents out of device
pins are negative. All voltages are referenced to GND unless otherwise
specified.
Note 4: This parameter is guaranteed by correlation and is not tested.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IOC
Overshoot Control Charging Current
VOC = 0V (E-, I-Grades)
VOC = 0V (H-Grade)
VOC = 0V (MP-Grade)
–15
–17
–17
–8.5
–8.5
–8.5
–5
–5
–4
μA
μA
μA
OC Clamp Voltage
0.93
V
OC Amplifier Offset Voltage
FB = 0.3V
48
mV
AVOL
Error Amplifier Open-Loop DC Gain
VCOMP = 0.8V to 1V (E-, I-Grades)
VCOMP = 0.8V to 1V (H-, MP-Grades)
60
55
80
80
dB
dB
Error Amplifier Unity-Gain Bandwidth
No Load (Note 4)
9
MHz
Error Amplifier Output Swing Low
FB = 1V
0.1
0.35
0.55
V
Error Amplifier Output Swing High
FB = 0V (E-, I-Grades)
FB = 0V (H-Grade)
FB = 0V (MP-Grade)
1.2
1.2
1.15
1.33
1.33
1.33
1.5
1.55
1.55
V
V
V
Error Amplifier Output Source Current
FB = 0V, COMP = 1V (E-, I-Grades)
FB = 0V, COMP = 1V (H-Grade)
FB = 0V, COMP = 1V (MP-Grade)
–800
–825
–825
–450
–450
–450
–225
–225
–200
μA
μA
μA
Error Amplifier Output Sink Current
FB = 1V, COMP = 1V
25
mA
Opto Driver Inverting DC Gain
–6.4
–6
–5.6
V/V
Opto Driver –3dB Bandwidth
No Load (Note 4)
600
kHz
Opto Driver Output Swing Low
FB = 0V, COMP = Open (E-, I-Grades)
FB = 0V, COMP = Open (H-, MP-Grades)
0.5
0.5
0.85
0.9
V
V
Opto Driver Output Swing High
VIN = 3V, FB = 1V, COMP = Open,
IOPTO = 10mA (E-, I-, H-Grades)
VIN = 3V, FB = 1V, COMP = Open,
IOPTO = 10mA (MP-Grade)
VIN – 1.25
VIN – 1.3
VIN – 1.05
VIN – 1.05
V
V
Opto Driver Output Swing High
VIN = 20V, FB = 1V, COMP = Open,
IOPTO = 10mA
4.2
5.6
7.5
V
ISC
Opto Driver Output
Short-Circuit Current (Sourcing)
FB = 1V, COMP = Open, OPTO = 0V
(E-, I-, H-Grades)
FB = 1V, COMP = Open, OPTO = 0V
(MP-Grade)
10.5
9.5
22
22
45
45
mA
mA
Opto Driver Output Sink Current
FB = 0V, OPTO = 1.5V (E-, I-, H-Grades)
FB = 0V, OPTO = 1.5V (MP-Grade)
150
135
350
350
650
650
μA
μA


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