- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385013 > TPS65552ARGT (Texas Instruments, Inc.) INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER PDF資料下載
參數(shù)資料
| 型號： | TPS65552ARGT |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER |
| 中文描述： | 綜合閃光燈充電器和IGBT驅(qū)動器 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大小： | 404K |
| 代理商： | TPS65552ARGT |
www.ti.com
P
OFF
ON
OFF
SW
T
LOGIC
V
V
I
I
V
ZERO
V
SW
V
BAT
V
A
V
OUT
0 V
0 V
I
SW
I
PEAK
0 A
I
OUT
I
PEAK
/N
TURN
0 A
Time 1
Time 2
Time 3
Time 4
Time 5
SW
T
V
FULL
CHG
XFULL
OFF
ON
OF
F
OFF ON
OFF
V
BAT
V
SW
0 V
V
BAT
V
OUT
V
A
0 V
V
OUT
V
A
I
PEAK
I
PEAK
/N
TURN
I
OUT
I
SW
I
SW
I
OUT
0 A
0 A
V
V
I
I
Control Charging
The TPS65552A provides three comparators to control charging.
Figure 2
shows the block diagram of
TPS65552A and
Figure 5
shows one timing diagram switching cycle. Note that emphasis is placed on Time1 and
Time3 of the waveform in
Figure 5
.
t
=L
ON
I
P
E
A
K
V
B
A
T
÷
÷
è
(1)
TPS65552A
SLVS567–JULY 2005
Figure 5. Timing Diagram at One Switching Cycle
Figure 6. Timing Diagram at Beginning/Ending
While SW is ON (Time1 to Time2 in
Figure 5
), U3 monitors current flow through integrated power-MOSFET from
SW to PGND. When I
(SW)
exceeds I
(PEAK)
, SW turns OFF (Time2 in
Figure 5
).
When SW turns OFF (Time2 in
Figure 5
), the magnetic energy in the transformer starts discharging. Meanwhile,
U2 monitors the kickback voltage at the SW terminal. As the energy is discharging, the kickback voltage is
increasing according to the increase of V
OUT
(Time2 to Time3 in
Figure 5
). When almost all energy is discharged,
the system cannot continue rectification via the diode, and the charging current of I
OUT
goes to zero (Times3 in
Figure 5
). After rectification stops, the small amount of energy left in the transformer is released via the parasitic
path, and the kickback voltage reaches zero (Time3 to Time4 in
Figure 5
). During this period, U2 makes SW turn
ON when (V
(SW)
- VBAT) dips from V
(ZERO)
(Time5 in
Figure 5
). In the actual circuit, the period between Time4
and Time5 in
Figure 5
is small or does not appear dependent on the delay time of the U2 detection to SW ON.
U1 also monitors the kickback voltage. When (V
(SW)
- VBAT) exceeds V
(FULL)
, TPS65552A stops charging (see
Figure 6
).
In
Figure 5
and
Figure 6
,
ON
time is always the same period in every switching. The
ON
time is calculated by
Equation 1
. This equation is not dependent on output voltage.
However,
OFF
time is dependant on output voltage. As the output voltage gets higher, the
OFF
time gets shorter
(see
Equation 2
).
7
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS6734I | FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY |
| TPS6735D | FIXED NEGATIVE 5-V 200-mA INVERTING DC/DC CONVERTER |
| TPS6735P | FIXED NEGATIVE 5-V 200-mA INVERTING DC/DC CONVERTER |
| TPS6755D | ADJUSTABLE INVERTING DC/DC CONVERTER |
| TPS6755P | ADJUSTABLE INVERTING DC/DC CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS65552ARGTR | 功能描述:其他電源管理 Intgrtd Photo Flash Charger & IGBT Drv RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| TPS65552ARGTRE3 | 功能描述:其他電源管理 Intgrtd Photo Flash Charger & IGBT Drv RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| TPS65552ARGTT | 制造商:Texas Instruments 功能描述:INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER - Tape and Reel |
| TPS6555XEVM-097 | 功能描述:電源管理IC開發(fā)工具 TPS6555X-097 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS65560EVM-165 | 功能描述:電源管理IC開發(fā)工具 FL CHARGER AND IGBT DRIVER RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。