HSMC3842 Hi-Sincerity Mocroelectronics, HSMC3842 Datasheet - Page 2

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

Pin Connection
Thermal Data
Electrical Specifications
Electrical Characteristics
Unless otherwise stated, specifications apply for 0 Ta 70 C Vcc =15V
triangular mode, RT=10k, CT=3.3nf for sawtooth mode
Under-Voltage Lockout Section
Start Threshold
Min. Operating Voltage
Reference Section
Reference Output Voltage
Line Regulation
Load Regulation
Temperature. Stability
Total Output Variation
Output Noise Voltage
Long Term Stability
Output Short current
Oscillator Section
Frequency
Frequency Chnge with Temperature
Frequency Change with Temperature
Oscillator Voltage Swing
Discharge Current
H3842P
1
8
Rth j-amb
Symbol
DIP-8P
7
2
6
3
Parameter
Parameter
5
4
Pin1: Compensation
Pin2: Voltage Feedback
Pin3: Current Sense
Pin4: RT/CT
Pin5: Ground
Pin6: Output
Pin7: Vcc
Pin8: Vref
Thermal Resistance Junction-ambient
HI-SINCERITY
MICROELECTRONICS CORP.
(Top View)
Function
After Turn On
Tj=25 C,Io=1mA
12V Vin 25V
1mA Io 20mA
(Note 2)
Line , Load , Temp
10Hz f 10kHz,Tj=25 C
Ta=125 C,1000Hrs
Ta=25 C
Tj=25 C
Tlow Ta Thigh
12V Vcc 25V
Tlow Ta Thigh
Tj=25 C
Tj=25 C
Tlow Ta Thigh
Peak to Peak
Description
Test Conditions
This pin is the Error Amplifier output and is made available for
loop compensation.
This is the inverting input of the Error Amplifier. It’s normally
connected to the switching power supply output through a
resistor divider.
A voltage proportional to inductor current is connected to this
input. The PWM uses this information to terminate the output
switch conduction.
The oscillator frequency and maximum output duty cycle are
programmed by connecting resistor RT to Vref and cpacitor CT
to ground. Operation to 500kHz is possible.
This pin is the combined control circuitry and power ground.
This output directly drives the gate of a power MOSFET. Peak
currents up to 1A are sourced and sunk by this pin.
This pin is the positive supply of the control IC.
This is the reference output. It provides charging current for
capacitor CT through resistor RT.
Test Conditions
(Note 2)
(Note 2)
(Note 2)
(Note 2)
(Note 1)
Description
; RT=680 , CT=0.022uF for
Min.
14.5
Min.
4.90
4.82
-30
8.5
7.8
7.2
47
46
-
-
-
-
-
-
-
-
-
Max.
Typ.
Typ.
-100
Spec. No. : HP200202
Issued Date : 1998.08.01
Revised Date : 2002.12.03
Page No. : 2/10
100
HSMC Product Specification
2.0
3.0
0.2
0.2
0.5
1.7
8.3
16
10
50
52
52
5
5
5
-
-
Max.
Max.
-180
17.5
11.5
5.18
5.1
9.3
9.5
20
25
57
60
1
-
-
-
-
-
-
mV/ C
Units
o
Units
Units
KHz
KHz
C/W
mV
mV
mV
mA
mA
mA
uV
%
%
%
V
V
V
V
V