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| 型號： | TPS65200YFFR |
| 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)： | 22/59頁 |
| 文件大小： | 2424K |
| 代理商： | TPS65200YFFR |
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Turn on VDP _SRC,
I
DM _SINK , DP_SW,
and DM_SW
Delay 40ms
DPDM_EN=0
DP_LOW = 0 &
DM_LOW = 1 &
DM_High = 0 ?
NO
Delay 40ms
Wall Charger
ILIMIT = 975mA
Done
DPDM_D = 1
YES
DISABLED
VIO < 0.6V?
VBUS > VUVLO ,VBUS
YES
Turn off VDP _SRC,
IDM _SINK , DP_SW,
and DM_SW
Turn off VDP_ SRC,
IDM _SINK , DP_SW,
and DM_SW
NO
VBUS <VUVLO ,VBUS
ILIMIT = 500mA
DPDM_EN = 1
Delay 200ms
Delay 40ms
Delay 80ms
USB port
ILIMIT = 500mA
DPDM_D = 0
0.8V
0.4V
VDP_ SRC
IDM_SINK
SW_DPSRC
DP_Low
DM_High
DM_Low
DM
DP
SW_ DP
SW_DM
D+ / D- Detection Circuit
S
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www.ti.com
SLVSA48 – APRIL 2010
Figure 48. Adaptor Identification Algorithm and Block Diagram
Bad Adaptor Detection/Rejection (CHBADI)
At the beginning of the charge cycle, the IC will perform the bad adaptor detection by applying a current sink to
VBUS. If VVBUS is higher than VIN(MIN) for 30 ms, the adaptor is good and the charge process will begin. However,
if VVBUS drops below VIN(MIN), a bad adaptor is detected. Then, the IC will disable the current sink, issue an
interrupt and set the CHBADI interrupt in the INT2 register. After a delay of TINT (2s), the IC will repeat the
adaptor detection process, as shown in Figure 50.
If the battery voltage is high (> 3.8 V) it is possible that the input voltage drops below the battery voltage during
adaptor rejection test. In this case the reverse protection will kick-in and disable the charger. Also note that the
30-mA current sink is turned on for 30 ms only. If the input capacitance is > 500 F (not recommended) the
adaptor may be accepted although it is not capable of providing 30-mA of current. In theses cases the VDPPM
loop will limit the charging current to maintain the input voltage.
Copyright 2010, Texas Instruments Incorporated
29
Product Folder Link(s): TPS65200
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