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UC1851J датащи(PDF) 2 Page - Texas Instruments

номер детали UC1851J
подробное описание детали  All Control, Driving, Monitoring, and Protection Functions Included
Download  12 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

UC1851J датащи(HTML) 2 Page - Texas Instruments

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UC1851
UC2851
UC3851
Supply Voltage, +VIN (Pin 15)
Voltage Driven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +32V
Current Driven, 100mA maximum . . . . . . . . . . . Self-limiting
PWM Output Voltage (Pin 12) . . . . . . . . . . . . . . . . . . . . . . . 40V
PWM Output Current, Steady-State (Pin 12) . . . . . . . . . 400mA
PWM Output Peak Energy Discharge . . . . . . . . . . . . 20
µJoules
Driver Bias Current (Pin 14) . . . . . . . . . . . . . . . . . . . . . -200mA
Reference Output Current (Pin 16) . . . . . . . . . . . . . . . . -50mA
Slow-Start Sink Current (Pin 8) . . . . . . . . . . . . . . . . . . . . 20mA
VIN Sense Current (Pin 11). . . . . . . . . . . . . . . . . . . . . . . . 10mA
Current Limit Inputs (Pins 6 & 7) . . . . . . . . . . . . . -0.5 to +5.5V
Stop Input (Pin 4) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +5.5V
Comparator Inputs
(Pins 1–7, 9–11, 16). . . . . . . . . . . . . . Internally clamped at 12V
Power Dissipation at TA = 25°C (Note 3). . . . . . . . . . . 1000mW
Power Dissipation at TC = 25°C (Note 3). . . . . . . . . . . 2000mW
Operating Junction Temperature . . . . . . . . . . . -55°C to +150°C
Storage Temperature Range . . . . . . . . . . . . . . -65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . +300°C
Note 1:All voltages are with respect to ground, Pin 13.
Currents are positive-into, negative-out of the
specified terminal
Note 2:All pin numbers are referenced to DIL-18 package.
Note 3:Consult Packaging Section of Databook for thermal
limitations and considerations of package.
DIL-18, SOIC-18 (TOP VIEW)
J or N, DW Package
CONNECTION DIAGRAMS
PACKAGE PIN FUNCTIONS
FUNCTION
PIN
COMP
1
START/UV
2
OV SENSE
3
STOP
4
RESET
5
CUR THRESH
7
CUR SENSE
8
SLOW START
9
RT/CT
10
RAMP
11
VIN SENSE
12
PWM OUT
13
GROUND
14
DRIVE BIAS
15
+VIN SUPPLY
17
5.0V REF
18
INV. INPUT
19
N.I. INPUT
20
PLCC-20, LCC-20
(TOP VIEW)
Q, L PACKAGE
ABSOLUTE MAXIMUM RATINGS (Note 1)
Unless otherwise stated, these specifications apply for TA = -55°C to +125°C for the
UC1851, -40°C to +85°C for the UC2851, and 0°C to 70°C for the UC3851; VIN =
20V, RT = 20k
Ω, CT = .001 mfd, RR = 10kΩ, CR = .001mfd. Current Limit Threshold
= 200mV, TA = TJ.
ELECTRICAL CHARACTERISTICS:
PARAMETER
TEST CONDITIONS
UC1851 / UC2851
UC3851
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
Power Inputs
Start-Up Current
VIN = 30V, Pin 2 = 2.5V
4.5
6
4.5
6
mA
Operating Current
VIN = 30V, Pin 2 = 3.5V
15
21
15
21
mA
Supply OV Clamp
VIN = 20mA
333945333945
V
Reference Section
Reference Voltage
TJ = 25°C
4.95
5.0
5.05
4.9
5.0
5.1
V
Line Regulation
VIN = 8 to 30V
10
15
10
20
mV
Load Regulation
IL = 0 to 10mA
1020
1030
mV
Total Ref Variation
Over Operating Temperature Range
4.9
5.1
4.85
5.15
V
Short Circuit Current
VREF = 0, TJ = 25°C
-80
-100
-80
-100
mA
Oscillator
Nominal Frequency
TJ = 25°C
47
50
53
45
50
55
kHz
Voltage Stability
VIN = 8 to 30V
0.5
1
0.5
1
%
Total Ref Variation
Over Operating Temperature Range
45
55
43
57
kHz
Maximum Frequency
RT = 2k
Ω, CT = 330pF
500
500
kHz
2


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