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TH1200FのメーカーはZetex Semiconductorsです、この部品の機能は「350mA High Efficiency Step Down LED Driver」です。 |
部品番号 | TH1200F |
| |
部品説明 | 350mA High Efficiency Step Down LED Driver | ||
メーカ | Zetex Semiconductors | ||
ロゴ | |||
このページの下部にプレビューとTH1200Fダウンロード(pdfファイル)リンクがあります。 Total 15 pages
TH1200F
350mA High Efficiency Step Down LED Driver
FEATURES
LED drive current up to 350mA
Compatible with 12V and 24V standard systems
Handles transients up to 40V
Single Pin Control and Dimming function
Power Efficiency up to 94%
Drives LED strings of up to 32V
Open and short LED protection
Parallel configuration for higher output current
RoHS-compliant TSOT-23 5-lead package
APPLICATIONS
12V and 24V Lighting Systems
Automotive and Aircraft Lighting
General lighting
High Brightness 350mA LEDs
ORDERING INFORMATION
Part Number
TH1200F-YE-ML1
Quantity
per Reel
3000
* Plated Finish: NiPdAu
PIN CONFIGURATION
Package
Marking
TFxx
TSOT-23 5-lead
CTRL 1
5 VBAT
GND 2
RSET 3
4 SW
(Top View)
DESCRIPTION
The TH1200F is a high efficiency step-down converter
optimized to drive high current LEDs. A patented
switching control algorithm allows highly efficient and
accurate LED current regulation. A single RSET
resistor sets the full scale LED string current up to
350mA from supplies as high as 36V.
The switching architecture of the TH1200F results in
extremely low internal power dissipation allowing the
device to be housed in a tiny package without the
need for dedicated heat sinking. The device is
compatible with switching frequencies of up to 1MHz,
making it ideal for applications requiring small footprint
and low value external inductors.
Analog dimming and LED shutdown control is
provided via a single input pin, CTRL. Additional
features include overload current protection and
thermal shutdown. The device is available in the low
profile 5-lead thin SOT23 package and is ideal for
space constrained applications.
For Ordering Information details, see page 14.
TYPICAL APPLICATION CIRCUIT
Bulb Replacement
VBAT
9V C1
4.7µF
R1
10kΩ
VBAT
TH1200F
RSET
CTRL
SW
GND
D C2
10µF
L
22µH
300mA
D: Central Schottky CMDSH05-4
L: Sumida CDRH6D26-220
See Table 1 on page 6 for external component selection.
1
1 Page TH1200F
Typical Operation Characteristics
VIN = 13V, ILED = 300mA, L = 22μH, C1= 4.7μF, C2 = 10μF, TAMB = 25°C unless otherwise specified
Input Operating Supply Current
1.0
Idle Mode Supply Current (CTRL = 0V)
200
0.8
150
0.6
100
0.4
0.2 50
0.0
8 10 12 14 16 18 20 22 24
INPUT VOLTAGE [V]
0
0 4 8 12 16 20 24
INPUT VOLTAGE [V]
CTRL Input Bias Current
250
200
150
100
50
0
0 2 4 6 8 10 12
CTRL VOLTAGE [V]
RSET Voltage vs. Temperature
1.30
VIN = 13V
1.25
1.20
1.15
1.10
-40
0 40 80
TEMPERATURE [°C]
120
RSET Voltage vs. CTRL Voltage
1.4
1.2
1.0 +25°C
0.8 -40°C
+ 85°C
0.6
0.4
0.2
0.0
0
1 23
CTRL VOLTAGE [V]
4
LED Current vs. RSET
400
300
200
100
0
5 10 15 20 25 30 35
RSET [kΩ]
3
3Pages TH1200F
Typical Operation Characteristics
VIN = 13V, ILED = 300mA, L = 22μH, C1= 4.7μF, C2 = 10μF, TAMB = 25°C unless otherwise specified
RSET Transient Response
Line Transient Response (10V to 13V)
External Component Selection
Table 1 provides the recommended external
components L and C2 that offer the best performance
relative to the LED current accuracy, LED ripple
current, switching frequency and component size.
LED current
(mA)
≥150
< 150
1 LED
L inductor
(µH)
C2 Capacitor
(µF)
10 2.2
22 4.7
33 4.7
47 10
2 LEDs
L inductor
(µH)
C2 Capacitor
(µF)
22 4.7
47 2.2
Table 1. External Component Selection
Note: Larger C2 capacitor values allow to reduce further the LED ripple current if needed.
6
6 Page | |||
ページ | 合計 : 15 ページ | ||
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PDF ダウンロード | [ TH1200F 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 |
TH1200F | 350mA High Efficiency Step Down LED Driver | Zetex Semiconductors |