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H3842P Datasheet

  • H3842P

  • HIGH PERFORMANCE CURRENT MODE CONTROLERS

  • 10頁(yè)

  • HSMC

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HI-SINCERITY
MICROELECTRONICS CORP.
Spec. No. : HP200202
Issued Date : 1998.08.01
Revised Date : 2002.12.03
Page No. : 1/10
H3842P / HSMC3842
HIGH PERFORMANCE CURRENT MODE CONTROLERS
Description
The H3842P/HSMC3842 are high performance fixed frequency current mode
controllers. They are specifically designed for Off-Line and DC To DC converter
applications offering the designer a cost-effective solution with minimal external
components. These integrated circuits feature a trimmed oscillator for precise duty
DIP-8Pin
cycle control. A temperature compensa-ted 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-by-cycle current limiting, programmable output deadtime, and a latch for single
pulse metering.
Features
鈥?/div>
Trimmed Oscillator for Precise Frequency Control
鈥?/div>
Oscillator Frequency Guaranteed at 250 kHz
鈥?/div>
Current Mode Operation to 500 kHz
鈥?/div>
Automatic Feed Forward Compensation
鈥?/div>
Latching PWM for Cycle-By-Cycle 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
Absolute Maximum Ratings
Symbol
Vi
Vi
Io
Eo
Parameter
Supply Voltage (low impedance source)
Supply Voltage (Ii<30mA)
Output Current
Output Energy (capacitive load)
Analog Inputs (pin 2, 3)
Error Amplifier Output Sink Current
Power Dissipation at Tamb鈮?5
o
C
Storage Temperature Range
Junction Operating Temperature
Lead Temperature (soldering 10s)
Value
30
Self Limiting
鹵1
5
-0.3 to 5.5
10
1.25
-65 to 150
-40 to 150
300
Unit
V
A
uJ
V
mA
W
o
C
o
C
o
C
Ptot
Tstg
TJ
TL
Block Diagram
Vcc
7
34V
Ground
5
2.50V
VREF Good
Logic
T
2R
R
S
R
1V
Current
Sense
Comparator
UVLO
S/R
5V
REF
Internal
Bias
6
8
VREF
5V 50mA
RT/CT
4
Error AMP.
+
-
OSC
Output
VFB
COMP
Current
Sense
2
1
3
PWM Latch
H3842P
HSMC Product Specification

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    HIGH PERFORMANCE CURRENT MODE CONTROLERS
    HSMC
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    HIGH PERFORMANCE CURRENT MODE CONTROLERS
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    HIGH PERFORMANCE CURRENT MODE CONTROLERS
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  • 英文版
    HIGH PERFORMANCE CURRENT MODE CONTROLERS
    HSMC [Hi-S...
  • 英文版
    HIGH PERFORMANCE CURRENT MODE CONTROLERS
    HSMC
  • 英文版
    HIGH PERFORMANCE CURRENT MODE CONTROLERS
    HSMC [Hi-S...

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