|
|
THX203HのメーカーはETCです、この部品の機能は「Switching Power Controller IC」です。 |
部品番号 | THX203H |
| |
部品説明 | Switching Power Controller IC | ||
メーカ | ETC | ||
ロゴ | |||
このページの下部にプレビューとTHX203Hダウンロード(pdfファイル)リンクがあります。 Total 21 pages
THX203H
【Switching Power Controller IC】
Contents
Introduction, characteristics and application field ···································································· 3
Reference frame of interior circuit···························································································· 4
www.DataSheet4U.com
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
1 Page THX203H
PWM Controller of High-performance Current Mode
Characteristics
z Set-in high-voltage power switch tube of 700V and few peripheral components
z With the modulation of lock pulse width, the testing is according to the pulse limit
current.
z With the function of output frequency reduction, the non-output power consumption can
be less than 0.3W.
z Inner-built ramp and anti-feedback compensation function
z The independent upper-limit current testing controller deals with over-current and
over-load of the controller real-timely.
www.DataSheet4U.czom The period emission pole is turned off and it outputs by deflected voltage, and the
pressure resistance of the power tube is improved.
z Set-in current limit resistance with temperature compensation, which makes the current
limit precise
z Set-in heat protection circuit
z Startup is accomplished with the magnification function of the switch power tube, and
the power consumption of startup resistance is reduced more than10 times.
z Few peripheral components
z Low startup and operating current
z VCC over-voltage automatic limit
z Continuous wide-voltage output power reaches 12W, and the output power of peak value
arrives at 18W.
Applied Field
z Adaptor (for example, travel charger, out power station)
z Open Frame (for example, DVD, DVB)
Reference Frame of Interior Circuit
Figure 1. Frame of Interior Current
-3-
3Pages THX203H
PWM Controller of High-performance Current Mode
Current sampling
Item Testing condition
Current sampling
limit
upper limit currentRS=1O
prevention
Power
supply
rejection ratio
transmission delay
Modulation of pulse width
www.DataSheet4UI.tceomm
Testing condition
Maximum duty cycle
Minimum duty cycle
Power current
Item Testing condition
Startup acceptance
current
Startup static current
Static current
Vcc=8V
Startup voltage
Close voltage of
oscillator
Restart voltage
Over-voltage limit
margin
Minimum Typical Maximum Unit
0.54 0.58 0.62 V
0.54 0.27 0.62 A
-
60 70
dB
-
150 250
ns
Minimum Typical Maximum Unit
53 57 61 %
-
- 3.5
%
Minimum Typical Maximum Unit
1.6 2.0 2.4 mA
-
55 80
μA
- 2.8 -
mA
8.6 8.8 9.0 V
4.0 4.3 4.5 V
- 3.7 -
V
9.2
9.6 10.0
V
Description of the Principle
z During start-up phase, VR is closed when electrified; FB pull-up power source is closed,
the start-up current is input from power tube to VCC through OE; OB controls the base
current of power tube and limits the current of power tube collector (namely, THX203H
starts the acceptance current), accordingly, the security of the power tube is ensured;
when VCC voltage goes up to 8.8V, the start-up phase is ended, and it comes into the
normal phase.
z During normal phase, VCC voltage shall keep at 4.8~9.0V, VR outputs 2.5V benchmark;
FB pull-up current source starts up; the oscillator output OSC1 decides the maximum
duty cycle, output OSC2 tries to touch off the power supply to enter open cycle to enter
the open cycle, and shield flashing peak current of the power tube ; if FB is less than
1.8V (about between 1.2-1.8V), the cycle of the oscillator will increase with it, the less
FB is, the wider the cycle of the oscillator is, until the oscillation stops (This
characteristic reduces the standby power consumption of the switching power.) ; if the
peripheral feedback tries to make VCC more than 9.6V, the in-circuit is fed back to FB
and makes VCC stabilize the voltage at 9.6V (According to this characteristic, we can
may not adopt peripheral feedback circuit, and stabilize the output voltage by in-circuit,
but the precision of stabilizing voltage is low); During the open cycle, OB supplies base
-6-
6 Page | |||
ページ | 合計 : 21 ページ | ||
|
PDF ダウンロード | [ THX203H データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
THX203 | High Performance Current Mode PWM Switching Power Supply | AMS |
THX203H | Switching power supply controller IC | TongHuaXin |
THX203H | Switching Power Controller IC | ETC |
THX203H | High Performance Current Mode PWM Switching Power Supply Controller | JINRUI TECHNOLOGIES |