HSMC3842 Hi-Sincerity Mocroelectronics, HSMC3842 Datasheet - Page 8

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

H3842P
Latched Shutdown
Error Amplifier Compensation
External Clock Synchronization
Cp
From Vo
From Vo
Sync Input
External
Ri
Rd
Rp
Ri
Rd
0.01uF
Cf
Cf
HI-SINCERITY
MICROELECTRONICS CORP.
Rf
Rf
47Ω
CT
RT
2
1
2
1
2.5V
2.5V
Vref
2N3905
+
+
-
-
8
4
2
1
EA
EA
+
+
+
-
1mA
1mA
2N3903
EA
4
8
2
1
+
R
R
SCR must be selected for a holding current of less than
0.5mA at TA(min). The simple two transistor circuit can be
used in place of the SCR as shown. All resistors are 10K.
2R
2R
+
-
EA
R
R
R
R
5
5
BIAS
+
OSC
1mA
BIAS
OSC
2R
Error Amp compensation circuit for
stabilizing any current-mode topology
except for boost and flyback converters
operating with continuous inductor
current
Error Amp compensation circuit for
stabilizing current-mode boost and
flyback topologies operating with
continuous inductor current.
5
2R
R
R
5
The diode clamp is
required if the Sync
amplitude is large enough
to cause the bottom side
of CT to go more than
300mV below ground
Spec. No. : HP200202
Issued Date : 1998.08.01
Revised Date : 2002.12.03
Page No. : 8/10
HSMC Product Specification