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UC3824DWG4 датащи(PDF) 1 Page - Texas Instruments

номер детали UC3824DWG4
подробное описание детали  HIGH SPEED PWM CONTROLLER
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

UC3824DWG4 датащи(HTML) 1 Page - Texas Instruments

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FEATURES
DESCRIPTION
4
5
6
7
3
2
1
8
9
15
10
OSC
+
1V
1.4V
9V
GATE
REF
GEN
Internal
Bias
10
4V
14
11
12
13
Output
Inhibit
VREF Good
VCC Good
UVLO
Shutdown
CPRTR
I
LIM
CPRTR
Inhibit
Wide Bandwidth
(Set Dom.)
1.25V
PWM Latch (Set Dom.)
R
S
V
IN
9mA
Clock
R
T
C
T
Ramp
E/A Out
NI
INV
Error
Amp
Soft Start
I
LIM/SD
V
CC
Gnd
V
REF 5.1V
Pwr Gnd
INV
OUT
Out
V
C
UC1824
UC2824
UC3824
SLUS326A – MARCH 1997 – REVISED JULY 2007
HIGH SPEED PWM CONTROLLER
• Complementary Outputs
The UC1824 family of PWM control devices is
optimized for high frequency switched mode power
• Practical Operation Switching Frequencies to
supply applications. Particular care was given to
1 MHz
minimizing
propagation
delays
through
the
• 50-ns Propagation Delay to Output
comparators and logic circuitry while maximizing
• High Current Dual Totem Pole Outputs (1.5 A
bandwidth and slew rate of the error amplifier. This
Peak)
controller is designed for use in either current mode
or voltage mode systems with the capability for input
• Wide Bandwidth Error Amplifier
voltage feed-forward.
• Fully Latched Logic With Double Pulse
Protection
circuitry
includes
a
current
limit
Suppression
comparator with a 1-V threshold, a TTL compatible
• Pulse-by-Pulse Current Limiting
shutdown port, and a soft-start pin which doubles as
• Soft Start/Maximum Duty Cycle Control
a maximum duty cycle clamp. The logic is fully
• Under-Voltage Lockout with Hysteresis
latched to provide jitter free operation and prohibit
multiple pulses at an output. An under-voltage
• Low Start Up Current (1.1 mA)
lockout section with 800 mV of hysteresis assures
• Trimmed Bandgap Reference (5.1 V ± 1%)
low start up current. During under-voltage lockout,
the outputs are high impedance.
BLOCK DIAGRAM
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 1997–2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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