HSMC3842 Hi-Sincerity Mocroelectronics, HSMC3842 Datasheet - Page 7

• Manufacturer Part Number: HSMC3842
• Description: HIGH PERFORMANCE CURRENT MODE CONTROLERS
• Manufacturer: Hi-Sincerity Mocroelectronics

Peak current (Is) is determined by the formula
Is(max.)
A small RC filter may be required to suppress switch transients.
H3842P
Current Sense Circuit
Slope Compensation Techniques
Isolated MOSFET Drive and Current Transformer Sensing
1V/Rs
Is
Rs
+
+
-
5.0Vref
R
R1
COMP/Latch
Rs
SLOPE
HI-SINCERITY
MICROELECTRONICS CORP.
S
R
Is
R
Q
C
+
-
Vcc
Current
Sense
RT
7
COMP
CT
GND
RT/CT
I
SENSE
V
REG
1
3
5
3
8
4
H3842
Error Ampl.
5
GND
6
3
C
R
Boundary
Rs
Isolation
Is
Rs
R
R1
2R
SLOPE
Ns
Q1
R
Vin
Np
1V
+
0
-
RT
CT
RT/CT
Ipk=((Vpin1-1.4)/3Rs)(Ns/Np)
I
SENSE
V
50%DC
REG
VGS Waveforms
Comparator
3
8
4
Current
Sense
H3842
Spec. No. : HP200202
Issued Date : 1998.08.01
Revised Date : 2002.12.03
Page No. : 7/10
HSMC Product Specification
5
GND
+
0
-
25%DC