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參數資料
型號: TPS65950ZXNT
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA209
封裝: 7 X 7 MM, 0.40 MM PITCH, PLASTIC, BGA-209
文件頁數: 36/167頁
文件大小: 2566K
代理商: TPS65950ZXNT
10
LED Drivers
10.1 General Description
LEDSYNC
LEDGND
LEDB
BATT
Device
*16...
BATT
120
W
160
W
032-060
TPS65950
Integrated Power Management/Audio Codec
SWCS032 – OCTOBER 2008
www.ti.com
Two arrays of parallel LEDs are driven (dedicated for the phone light). The parallel LEDs are supplied by
VBAT and the external resistor value is given for each of them. The TPS65950 has two open-drain LED
drivers for keypad backlighting. The keypad backlighting must incorporate any required current limiting
and be rated for operation at the main battery voltage.
Figure 10-1 is a block diagram of the LED driver. Table 10-1 lists the electrical characteristics of the LED
driver.
Figure 10-1. LED Driver Block Diagram
For the component values, see Table 15-1.
Table 10-1. Electrical Characteristics
Parameter
Conditions
Min(1)
Typ(2)
Max(3)
Unit
IO = 160 mA
3
4
Software On resistance
IO = 60 mA
10
12
(1)
Min = Minimum value
(2)
Typ = Typical value
(3)
Max = Maximum value
130
LED Drivers
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