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參數(shù)資料
| 型號： | TPS65200YFFT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, BGA36 |
| 封裝： | 2.80 X 2.60 MM, 0.40 MM PITCH, GREEN, DSBGA-36 |
| 文件頁數(shù)： | 19/59頁 |
| 文件大?。?/td> | 2424K |
| 代理商： | TPS65200YFFT |
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I =
PP
V
D
IN
L f
S
I
=
OUT(MAX)
V
IN
(I -
LIM
I
PP
2
h
V
OUT
)
SLVSA48 – APRIL 2010
www.ti.com
3. VOUT = Output voltage of the boost converter. It is equal to the sum of VFB and the voltage drop across
LEDs.
(4)
Where:
1. IPP = inductor peak to peak ripple
2. L = inductor value
3. fs = switching frequency
(5)
Where:
1. IOUT(MAX) = maximum output current of the boost converter
2. ILIM = over current limit
3. h = efficiency
For instance, for VIN = 3 V, 7 LEDs output equivalent to VOUT of 23 V, an inductor value of 22 H, a current limit
of 700 mA, and an efficiency of 85%, the maximum output current is ~65 mA.
CHARGE MODE OPERATION
For current limited power source, such as a USB host or hub, the high efficiency converter is critical in fully
utilizing the input power capacity and quickly charging the battery. Due to the high efficiency in a wide range of
the input voltage and battery voltage, the switching mode charger is a good choice for high speed charging with
less power loss and better thermal management.
The TPS65200 is a highly integrated synchronous switch-mode charger with reverse boost function for USB
OTG support, featuring integrated MOSFETs and small external components, targeted at extremely space-limited
portable applications powered by 1-cell Li-ion or Li-polymer battery pack.
26
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS65200
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