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PDF THX202H Data sheet ( Hoja de datos )
| Número de pieza | THX202H | |
| Descripción | Switching Power Controller IC | |
| Fabricantes | ETC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de THX202H (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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THX202H
【Switching Power Controller IC】
Contents
Introduction, characteristics and application field ···································································· 3
Reference frame of interior circuit···························································································· 4
Description of pins’ function ···································································································· 4
Ultimate parameters ················································································································· 5
Recommended working condition ···························································································· 5
Electric parameters ··················································································································· 5
Principal Discription················································································································· 7
Definition of Electric Parameters ····························································································· 8
Application information ··········································································································· 9
Typical application circuit ······································································································ 11
Components Listing ··············································································································· 12
Making coils for transformer ································································································ 13
Test data ································································································································· 14
Wave-form of main experimental units ·················································································· 15
Parameters of thermal resistance and junction temperature ···················································· 19
Dimensional chart of encapsulation························································································ 20
Free Datasheet http://www.datasheet4u.com/
1 page  
THX202H
PWM Controller of High-performance Current Mode
Electric Parameter (Ta=25℃, Vcc=5.5-7.5V, Ct=330PF)
Output
Item Testing condition
Maximum pressureIoc=10mA
resistance
of
switching tube
on-saturation pressureIoc=250mA
drop
Output rise-time CL=1nF
Output fall-time
CL=1nF
Output limit current Tj=0-100℃
OE clamp voltage OE=0.001-0.29A
Reference
Item Testing condition
Reference outputIo=1.0mA
voltage
power adjustmentVcc=5.5-9V
ratio
Load adjustmentIo=0.1-1.2mA
ratio
Temperature stability
Output noise voltage F=10Hz-10KHz
Long-term stability Operate 1000h under
condition of T=85℃
Oscillator
Item Testing condition
Oscillating frequency Ct=330PF
Frequency changeVcc=5.5-9V
ratio with voltage
Frequency change rateTa=0-85℃
with temperature
Vibration amplitude of
oscillator(Vp-p)
Drop edge ofCt=330PF
oscillator
Feedback
Item Testing condition
Pull-up
Input
current
impedance pull-down
resistance
Power supply rejectionVcc=5.5-9V
ratio
Minimum Typical Maximum Unit
700 - -
V
- -1 V
-
- 75
ns
-
- 75
ns
250 270 290 mA
- 1.5 - V
Minimum Typical Maximum Unit
2.4 2.5 2.6 V
-
2 20
mV
- -3 %
- 0.2 - mV/℃
-
- 50
μV
the- 5 - mV
Minimum Typical Maximum Unit
59 66 73 KHz
- -1 %
- -1 %
- 2.2 - V
- 800 - ns
Minimum Typical Maximum Unit
-
0.50 0.60
mA
- 30 -
KΩ
-
60 70
dB
-5-
Free Datasheet http://www.datasheet4u.com/
5 Page 
THX202H
PWM Controller of High-performance Current Mode
decreasing when IC over-voltage limit
works.
6. Maximum switching current limit
IC has the function of current limit
cycle by cycle. It will test every
switching current in every switching
cycle, if the current fixed by FB or upper
limit current prevention is reached, it
will come into the close cycle, and the
detection of the current has the function
of real-time foreland hide, it can shield
the switching peak, and avoid the wrong
detection of the switching current. Then
the reasonable temperature compensation
eliminates the influence of temperature,
comparing with normal MOSFET (the
alteration of Ron will be large when the
temperature changes) switching chip, the
switching current can always be very
accurate in a larger range, thus not too
much allowance is needed to match a
larger working temperature range for the
designer when he designs the scenario,
and the security of the circuit for use can
be improved.
The typical maximum limit value of
switching current for THX202H is 0.25A.
When designing a flyback power with
80V of emitter voltage, it can accomplish
the output power of more than 5W easily,
and meet the broad temperature range.
7. Requirement of heat elimination
As for a typical power switch, it must
have necessary heat elimination
measures, so as to avoid that the
excessive heat leads to heat protection.
The primary heat inside IC is produced
by the on-off wasting of the switching
tube, so appropriate heat elimination
position is Pin7-8 pin of IC, one wieldy
way is to pave PCB copper foil of a
certain area on Pin7-8 pin, what’s more,
plating tin on the copper foil will
improve the heat elimination ability
greatly. For an input of 85-265V, the
typical application of 5W output and
100mm2 copper foil are necessary.
Reference wiring is as the following
figure:
Typical application circuit(input 85-265V, output 5V 1A):
- 11 -
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet THX202H.PDF ] | |
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