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UC3843ADR2 Datasheet

  • UC3843ADR2

  • High Performance Current Mode Controllers(292.77 k )

  • 20頁

  • ETC

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UC3842A, UC3843A,
UC2842A, UC2843A
High Performance
Current Mode Controllers
The UC3842A, UC3843A series of high performance fixed
frequency current mode controllers are specifically designed for
off鈥搇ine and dc鈥搕o鈥揹c converter applications offering the designer a
cost effective solution with minimal external components. These
integrated circuits feature a trimmed oscillator for precise duty cycle
control, a temperature compensated reference, high gain error
amplifier, current sensing comparator, and a high current totem pole
output ideally suited for driving a power MOSFET.
Also included are protective features consisting of input and
reference undervoltage lockouts each with hysteresis, cycle鈥揵y鈥揷ycle
current limiting, programmable output deadtime, and a latch for single
pulse metering.
These devices are available in an 8鈥損in dual鈥搃n鈥搇ine plastic package
as well as the 14鈥損in plastic surface mount (SO鈥?4). The SO鈥?4
package has separate power and ground pins for the totem pole output
stage.
The UCX842A has UYLO thresholds of 16 V (on) and 10 V (off),
ideally suited for off鈥搇ine converters. The UCX843A is tailored for
lower voltage applications having UVLO thresholds of 8.5 V (on) and
7.6 V (off).
鈥?/div>
Trimmed Oscillator Discharge Current for Precise Duty Cycle
Control
鈥?/div>
Current Mode Operation to 500 kHz
鈥?/div>
Automatic Feed Forward Compensation
鈥?/div>
Latching PWM for Cycle鈥揃y鈥揅ycle Current Limiting
鈥?/div>
Internally Trimmed Reference with Undervoltage Lockout
鈥?/div>
High Current Totem Pole Output
鈥?/div>
Undervoltage Lockout with Hysteresis
鈥?/div>
Low Startup and Operating Current
鈥?/div>
Direct Interface with ON Semiconductor SENSEFET Products
http://onsemi.com
8
1
PDIP鈥?
N SUFFIX
CASE 626
14
1
SO鈥?4
D SUFFIX
CASE 751A
8
1
SO鈥?
D1 SUFFIX
CASE 751
PIN CONNECTIONS
Compensation 1
Voltage Feedback 2
Current Sense 3
R
T
/C
T
4
(Top View)
Compensation
NC
Voltage Feedback
NC
Current Sense
NC
R
T
/C
T
1
2
3
4
5
6
7
(Top View)
14 V
ref
13 NC
12 V
CC
11 V
C
10 Output
9
8
Gnd
Power Ground
8
7
6
5
V
ref
V
CC
Output
Gnd
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 16 of this data sheet.
漏
Semiconductor Components Industries, LLC, 2001
1
October, 2001 鈥?Rev. 3
Publication Order Number:
UC3842A/D

UC3843ADR2 產品屬性

  • 2,500

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 切換控制器

  • -

  • 電流模式

  • 1

  • 500kHz

  • 96%

  • 7.6 V ~ 30 V

  • 無

  • 無

  • 是

  • 無

  • 無

  • 無

  • 無

  • 是

  • 0°C ~ 70°C

  • 14-SOIC（0.154"，3.90mm 寬）

  • 帶卷 (TR)

  • UC3843ADR2OSTR

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