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CS3844BGD14

Description
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO14, 0.150 INCH, SO-14
CategoryPower/power management    The power supply circuit   
File Size141KB,6 Pages
ManufacturerCHERRY
Websitehttp://www.cherry-semi.com
Download Datasheet Parametric Compare View All

CS3844BGD14 Overview

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO14, 0.150 INCH, SO-14

CS3844BGD14 Parametric

Parameter NameAttribute value
package instruction0.150 INCH, SO-14
Reach Compliance Codeunknown
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage25 V
Minimum input voltage12 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G14
Number of functions1
Number of terminals14
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current1 A
Package body materialPLASTIC/EPOXY
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Certification statusNot Qualified
surface mountYES
Switch configurationBUCK
Maximum switching frequency500 kHz
Temperature levelCOMMERCIAL
Terminal formGULL WING
Terminal locationDUAL
Base Number Matches1
CS3844B
Preliminary
CS3844B
Current Mode PWM Control Circuit
with 50% Max Duty Cycle
Description
The CS3844B provides all the neces-
sary features to implement off-line
fixed frequency current-mode control
with a minimum number of external
components.
50%. An undervoltage lockout ensures
that V
REF
is stabilized within specifica-
tion before the output stage is enabled.
The CS3844B has been optimized for
lower start up current (600µA max).
Other features include 1% trimmed
band gap reference, pulse-by-pulse
current limiting, and a high-current
totem pole output for driving capaci-
tive loads.
Features
The CS3844B incorporates a precision
temperature-controlled oscillator to
minimize variations in frequency. An
internal toggle flip-flop, which blanks
the output off every other clock cycle,
limits the duty-cycle range to less than
A
IN
IM
EL
PR
Absolute Maximum Ratings
Y
R
Supply Voltage (I
CC
<30mA) ..........................................................Self Limiting
Supply Voltage (Low Impedance Source)...................................................30V
Output Current ...............................................................................................±1A
Output Energy (Capacitive Load) .................................................................5µJ
Analog Inputs (V
FB
, V
Sense
).............................................................-0.3V to 5.5V
Error Amp Output Sink Current...............................................................10mA
Lead Temperature Soldering
Wave Solder (through hole styles only) ..........10 sec. max, 260°C peak
Reflow (SMD styles only) ...........60 sec. max above 183°C, 230°C peak
Block Diagram
s
Optimized for Off-line Use
s
Temperature
Compensated Oscillator
s
50% Maximum Duty-cycle
Clamp
s
Low Start-up Current
(600µA max)
s
Pulse-by-pulse Current
Limiting
s
Undervoltage Active Pull
Down
s
Double Pulse Suppression
s
1% Trimmed Bandgap
Reference
s
High Current Totem Pole
Output
V
CC
34V
Gnd
16V/10V
V
FB
Error
Amplifier
-
+
OSC
RY
NA
I
IM
EL
PR
V
CC
Undervoltage Lock-out
6V (0.8V)
V
CC
Pwr
Set/
5.0 Volt
Reset Reference
V
REF
Internal
Bias
R
V
REF
Undervoltage
Lockout
Toggle
Flip-Flop
2.50V
R
Oscillator
NOR
V
OUT
2 R
R
1V
Current
Sensing
Comparator
PWM
Latch
S
Pwr Gnd
R
Package Options
8 Lead PDIP & SO
COMP
V
FB
Sense
OSC
1
2
3
4
8
7
6
5
V
REF
V
CC
V
OUT
Gnd
14 Lead SO Narrow
COMP
1
NC
2
V
FB
3
NC
4
Sense
5
14
13
12
11
10
9
8
COMP
V
REF
NC
V
CC
V
CC
Pwr
V
OUT
Gnd
Pwr Gnd
NC
6
OSC
7
Sense
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
Rev. 11/19/98
1
A
®
Company

CS3844BGD14 Related Products

CS3844BGD14 CS3844BGN8 CS3844BGDR8 CS3844BGDR14 CS3844BGD8
Description Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO14, 0.150 INCH, SO-14 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDIP8, 0.300 INCH, PLASTIC, DIP-8 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, 0.150 INCH, SO-8 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO14, 0.150 INCH, SO-14 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, 0.150 INCH, SO-8
package instruction 0.150 INCH, SO-14 0.300 INCH, PLASTIC, DIP-8 0.150 INCH, SO-8 0.150 INCH, SO-14 0.150 INCH, SO-8
Reach Compliance Code unknown unknown unknown unknown unknown
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 25 V 25 V 25 V 25 V 25 V
Minimum input voltage 12 V 12 V 12 V 12 V 12 V
Nominal input voltage 15 V 15 V 15 V 15 V 15 V
JESD-30 code R-PDSO-G14 R-PDIP-T8 R-PDSO-G8 R-PDSO-G14 R-PDSO-G8
Number of functions 1 1 1 1 1
Number of terminals 14 8 8 14 8
Maximum operating temperature 70 °C 70 °C 70 °C 70 °C 70 °C
Maximum output current 1 A 1 A 1 A 1 A 1 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE IN-LINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
surface mount YES NO YES YES YES
Switch configuration BUCK BUCK BUCK BUCK BUCK
Maximum switching frequency 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Terminal form GULL WING THROUGH-HOLE GULL WING GULL WING GULL WING
Terminal location DUAL DUAL DUAL DUAL DUAL
Base Number Matches 1 1 1 1 -
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