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參數(shù)資料
| 型號： | TPS61062DRB |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | CONSTANT CURRENT LED DRIVER WITH DIGITAL AND PWM BRIGHTNESS CONTROL |
| 中文描述： | 恒定電流LED驅(qū)動器，帶有數(shù)字和PWM亮度控制 |
| 文件頁數(shù)： | 13/22頁 |
| 文件大?。?/td> | 609K |
| 代理商： | TPS61062DRB |
www.ti.com
INPUT CAPACITOR SELECTION
For good input voltage filtering low ESR ceramic capacitors are recommended. A 1-μF ceramic input capacitor is
sufficient for most of the applications. For better input voltage filtering and EMI reduction this value can be
increased. The input capacitor should be placed as close as possible to the input pin of the converter. Table 3
shows possible input and/or output capacitors.
LAYOUT CONSIDERATIONS
As for all switching power supplies, the layout is an important step in the design, especially at high peak currents
and switching frequencies. If the layout is not carefully done, the regulator might show noise problems and duty
cycle jitter. The input capacitor should be placed as close as possible to the input pin for good input voltage
filtering. The inductor should be placed as close as possible to the switch pin to minimize the noise coupling into
other circuits. The output capacitor needs to be placed directly from the OUT pin to GND rather than across the
LEDs. This reduces the ripple current in the trace to the LEDs. The GND pin needs to be connected directly to
the PGND pin. When doing the PCB layout, the bold traces (Figure 16) should be routed first, as well as
placement of the inductor, input and output capacitors.
VIN
2.7 V to 6 V
L1
VIN
EN
ILED
GND
SW
OUT
FB
PGND
Keep These Traces as
Short as Possible
C2
220 nF
R
S
12
C1
1
F
Traces in Bold Need to be
Routed First and Should be
Kept as Short as Possible
TPS61060
TPS61061
TPS61062
SLVS538–NOVEMBER 2004
to use X5R or X7R dielectric material to avoid the output capacitor value falling far below 220 nF over
temperature and applied voltage. For systems with wireless or RF sections, EMI is always a concern. To
minimize the voltage ripple in the LED string and board traces, the output capacitor needs to be connected
directly from the OUT pin of the device to ground rather than across the LEDs. A larger output capacitor value
reduces the output voltage ripple. Table 3 shows possible input and/or output capacitors.
Table 3. Capacitor Selection
CAPACITOR
INPUT CAPACITOR
1 μF
OUTPUT CAPACITOR
220 nF
220 nF
470 nF
1 μF
1 μF
1 μF
VOLTAGE RATING
FORM FACTOR
COMPONENT SUPPLIER
(1)
COMMENTS
10 V
0603
Tayo Yuden LMK107BJ105
16 V
50 V
35 V
16 V
35 V
25 V
0603
0805
0805
0805
1206
1206
Tayo Yuden EMK107BJ224
Tayo Yuden UMK212BJ224
Tayo Yuden GMK212BJ474
Tayo Yuden EMK212BJ105
Tayo Yuden GMK316BJ105
TDK C3216X7R1E105
TPS61060
TPS61060/61/62
TPS61060/61/62
TPS61060
TPS61060/61/62
TPS61060/61/62
(1)
Similar capacitors are also available from TDK and other suppliers.
Figure 16. Layout Considerations
13
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS61062DRBR | 功能描述:LED照明驅(qū)動器 24V 400mA Switch 1MHz Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61062DRBRG4 | 功能描述:LED照明驅(qū)動器 24V 400mA Switch 1MHz Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61062YZF | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CONSTANT CURRENT LED DRIVER WITH DIGITAL AND PWM BRIGHTNESS CONTROL |
| TPS61062YZFR | 功能描述:LED照明驅(qū)動器 24V 400mA Switch 1MHz Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS61062YZFT | 功能描述:LED照明驅(qū)動器 24V 400mA Switch 1MHz Boost Converter RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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