- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98285 > TPS65040ZQER (TEXAS INSTRUMENTS INC) 8-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA71 PDF資料下載
參數(shù)資料
| 型號(hào)： | TPS65040ZQER |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 8-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA71 |
| 封裝： | 5 X 5 MM, 0.50 MM PITCH, GREEN, PLASTIC, MICRO, BGA-71 |
| 文件頁(yè)數(shù)： | 38/73頁(yè) |
| 文件大小： | 1928K |
| 代理商： | TPS65040ZQER |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)當(dāng)前第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)
BUCK-BOOST DC/DC CONVERTER POWER-UP SEQUENCE AND MODE STATE DESCRIPTION
Power-Up Sequence
PABIAS1 Pin Input Voltage Range
Disable Mode
Active Discharge When Disable Mode
Idle Mode
Softstart Mode
Normal Operation Mode
SLVS708B – NOVEMBER 2006 – REVISED APRIL 2007
Table 2. Low/High Control for External DC/DC Converter (continued)
REG_EN(1)
VIO1V8(1)
TXONFST
r[PSCNTDC/DC_EXT]
EXT_DC_DC_ON_OFF
1
0
Low
1
0
Low
0
Don't Care
Low
1
0
Don't Care
Low
Pin PABIAS1 controls the output voltage and must have an input to set the output voltage before power up of
the DC/DC converter. If PABIAS1 pin has an unknown voltage, the DC/DC converter can not regulate the output
voltage; and, the device or peripheral components may be damaged. Figure 72 shows the power-up sequence
for the DC/DC converter: (a) via an external pin controlled by TXONFST, and (b) via a register command control.
Figure 72 shows each mode from OFF (Disable Mode) to ON (Normal Operation Mode). The following
paragraphs give more details.
The input voltage range of PABIAS1 pin is from 0.4 V to 2.414 V. This range keeps the output voltage of the
DC/DC converter at the proper level. Also, it must be input before power-up of the DC/DC converter.
Table 1 shows the buck-boost DC/DC converter is disabled when TXONFST = Low, or r[PSCNTDC/DC] = Low.
Then the analog circuit of Figure 70 is disabled and the logic circuit is reset. Also, current-limit protection and
short-circuit protection are disabled.
VOUT output is pulled down to 0V when the buck-boost DC/DC converter is disabled. Then MN1, MP2 = ON
and MP1, MN2 = OFF in Figure 70. VOUT pin is pulled down to 0V via the coil, but when VOUT is below 0.6 V,
the discharging speed is at a gentle slope. Because the power supply of the MN2 and its gate driver buffer in
Figure 70 are supplied from VOUT, the MN2 cannot discharge the VOUT to 0V.
Table 1 shows the DC/DC converter is enabled when TXONFST = High and r[PSCNTDC/DC] = High. Figure 72
shows each mode during power-up sequence. Since the analog circuit is unstable, output transistors (MP1,
MN1, MP2, MN2) operate after 50
s (typ), counted by an internal oscillator. After the count-up it shifts to
softstart mode. Current-limit protection and short-circuit protection are disabled. Figure 72 shows the same
sequence; that is, TXONFST turns from low to high at r[PSCNTDC/DC] = High, and r[PSCNTDC/DC] turns low
to high at TXONFST = High.
Softstart mode operates to avoid rush current when the buck-boost DC/DC converter activates the output
transistor via idle mode. Internal VREF_SS ramps up within 500
s (max) by counter, when idle mode shifts to
softstart mode. Output voltage is set by PABIAS1 pin. The time of softstart mode depends on the value of the
output voltage. SS_OK = High finishes softstart mode when VREF_SS is counted up. After completing softstart
mode, current-limit protection and short-circuit protection start operation simultaneously.
Normal operation mode provides line regulation, load regulation, and fast transient response control by the
analog input of PABIAS1 pin. Current-limit and short-circuit protection are enabled continuously.
43
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS650531IRGERQ1 | POWER SUPPLY SUPPORT CKT, PQCC24 |
| TPS650532RGET | 5-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC24 |
| TPS650531RGER | 5-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC24 |
| TPS65055RSMR | 1.8 A DUAL SWITCHING CONTROLLER, 2475 kHz SWITCHING FREQ-MAX, PQCC32 |
| TPS65058RGET | 1.8 A DUAL SWITCHING CONTROLLER, 2475 kHz SWITCHING FREQ-MAX, PQCC32 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS65050EVM-195 | 功能描述:電源管理IC開發(fā)工具 TPS65050-195 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS65050RSMR | 功能描述:PMIC 解決方案 6-Ch Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65050RSMRG4 | 功能描述:PMIC 解決方案 6Ch Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65050RSMT | 功能描述:PMIC 解決方案 6-Channel Power Management IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65050RSMTG4 | 功能描述:PMIC 解決方案 6-Ch Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。