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NCP1650
MAXIMUM RATINGS (Maximum ratings are those that, if exceeded, may cause damage to the device. Electrical Characteristics are
not guaranteed over this range.)
Rating
Power Supply Voltage (Operating) Output (Pin 16)
Current Sense Inverting Input (Pin 12)
Reference Voltage (Pin 2)
Reference Filter (Pin 4)
All Other Inputs
Thermal Resistance, Junction--to--Air
0.1 in 2 Copper
0.5 in 2 Copper
Thermal Resistance, Junction--to--Lead (Pin 1) (Note 1)
Maximum Power Dissipation @ T A = 25 ? C
Operating Temperature Range
Non--operating Temperature Range
Symbol
V CC
V(I S --)
V ref
Ref fltr
θ JA
θ JL
P max
T J
T J
Value
--0.3 to 20
--0.5 to 1.0
--0.3 to 7.5
--0.3 to 5.0
--0.3 to 6.5
130
110
50
0.77
--40 to 125
--55 to 150
Unit
V
V
V
V
V
? C/W
? C/W
W
? C
? C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. θ JL is equivalent to Psi JL
ELECTRICAL CHARACTERISTICS (Unless otherwise noted: V CC = 14 volts, C T = 470 pF, C 2 = 0.1 m F, T J = 25 ? C for typical
values. For min/max values T J is the applicable junction temperature.)
Characteristic
Symbol
Min
Typ
Max
Unit
OSCILLATOR
Frequency
Max Duty Cycle
Min Duty Cycle (Note 2)
Ramp Peak (Note 2)
Ramp Valley (Note 2)
Ramp Compensation Peak Voltage (Pin 13) (Note 2)
Ramp Compensation Current (Pin 13) (Note 2)
F osc
dmax
dmin
V Rpeak
V Rvalley
--
--
90
0.95
--
--
--
--
--
100
0.97
0
4.0
0.100
4.0
400
110
--
5.0
--
--
--
--
kHz
--
%
V
V
V
m A
VOLTAGE ERROR AMPLIFIER
Input Bias Current (Note 2)
Input Offset Voltage (Note 2)
Transconductance (T J = --40 ? C to + 125 ? C)
Output Source (V ref + 0.2 V)
Output Sink (V ref -- 0.2 V)
I bias
V IO
g m
I Osource
I Osink
--
--
90
10
--10
0.2
10
120
20
--20
0.6
--
150
--
--
m A
mV
umho
m A
m A
Boost Current (V ref = 4.0 volts nominal)
Source Boost Current Threshold (V pin6 /V ref )
Sink Boost Current Threshold (V pin6 /V ref )
Source Boost Current (V ref + 0.4 V)
Sink Boost Current (V ref -- 0.4 V)
V fb(boost+)
V fb(boost--)
I (boost+)
I (boost--)
--
--
150
--150
1.06
0.920
230
--260
--
--
--
--
V/V
V/V
m A
m A
2. Verified by design.
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