參數(shù)資料
型號(hào)： H3842P
廠商： HSMC CORP.
英文描述： HIGH PERFORMANCE CURRENT MODE CONTROLERS
中文描述： 高性能電流模式CONTROLERS
文件頁(yè)數(shù)： 1/10頁(yè)
文件大小： 154K
代理商： H3842P
HI-SINCERITY
MICROELECTRONICS CORP.
Spec. No. : HP200202
Issued Date : 1998.08.01
Revised Date : 2002.12.03
Page No. : 1/10
H3842P
HSMC Product Specification
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
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
Trimmed Oscillator for Precise Frequency Control
Oscillator Frequency Guaranteed at 250 kHz
Current Mode Operation to 500 kHz
Automatic Feed Forward Compensation
Latching PWM for Cycle-By-Cycle Current Limiting
Internally Trimmed Reference with Undervoltage Lockout
High Current Totem Pole Output
Undervoltage Lockout with Hysteresis
Low Startup and Operating Current
Absolute Maximum Ratings
Symbol
Vi
Vi
Io
Eo
Parameter
Value
30
Unit
V
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
≤
25
o
C
Storage Temperature Range
Junction Operating Temperature
Lead Temperature (soldering 10s)
Block Diagram
Self Limiting
±
1
5
-0.3 to 5.5
10
1.25
-65 to 150
-40 to 150
300
A
uJ
V
mA
W
o
C
o
C
o
C
Ptot
Tstg
TJ
TL
DIP-8Pin
1V
34V
2R
R
1
2
3
4
5
6
7
8
Vcc
Ground
VFB
COMP
Current
Sense
+
-
Error AMP.
VREF Good
Logic
2.50V
Current
CSense
T
UVLO
5V
Internal
Bias
PWM Latch
Output
VREF
5V 50mA
S/R
RT/CT
S
R
OSC
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