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參數資料
| 型號： | TPS62420DRC |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 1.61 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, PLASTIC, SON-10 |
| 文件頁數： | 11/37頁 |
| 文件大?。?/td> | 1020K |
| 代理商： | TPS62420DRC |
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SLVS676C – JUNE 2006 – REVISED JUNE 2010
Table 1. Addressable Registers for Fixed Output Voltage Options (PIN DEF_1 = digital input)
DEVICE
REGISTER
DESCRIPTION
DEF_1
A1
A0
D4
D3
D2
D1
D0
PIN
REG_DEF_1_High
Converter 1 output voltage setting for
high
0
1
Output voltage setting, see
DEF_1 = High condition. The content of the
Table 4
register is active with DEF1_ Pin high.
REG_DEF_1_Low
Converter 1 output voltage setting
low
0
Output voltage setting, see
TPS62421
Table 4
REG_DEF_2
Converter 2 output voltage
n/a
1
0
Output voltage setting, see
Table 6
Don’t’ use
1
Table 2. Addressable Registers for Adjustable Output Voltage Devices
REGISTER
DESCRIPTION
A1
A0
D4
D3
D2
D1
D0
REG_DEF_1_High
Not available in TPS62420 adjustable version
0
1
REG_DEF_1_Low
Converter 1 output voltage setting
0
TPS62420 see Table 5
REG_DEF_2
Converter 2 output voltage
1
0
TPS62420 see Table 6, connect ADJ2
pin directly to VOUT2
Don’t use
1
Bit Decoding
The bit detection is based on a PWM scheme, where the criterion is the relation between tLOW and tHIGH. It can
be simplified to:
Low Bit: tLow> tHigh, but with tLow at least 2x tHigh, see Figure 31
The bit detection starts with a falling edge on the MODED/DATA pin and ends with the next falling edge.
Depending on the relation between tLow and tHigh a 0 or 1 is detected.
Acknowledge
The Acknowledge condition is only applied if:
Acknowledge is requested by a set RFA bit
The transmitted device address matches with the device address of the device
16 bits were received correctly
In this case, the device turns on the internal ACKN-MOSFET and pulls the MODE/DATA pin low for the time
tACKN, which is max. 520ms. The Acknowledge condition is valid after an internal delay time tvalACK. This means
the internal ACKN-MOSFET is turned on after tvalACK, when the last falling edge of the protocol was detected.
The master controller keeps the line low during this time.
The master device can detect the acknowledge condition with it’s input by releasing the MODE/DATA pin after
tvalACK and read back a 0.
In case of an invalid device address or not correctly received protocol, no acknowledge condition will be applied,
thus the internal MOSFET will not be turned on and the external pullup resistor pulls MODE/DATA pin high after
tvalACK. The MODE/DATA pin can be used again after the acknowledge condition ends.
NOTE
The acknowledge condition may only be requested in case the master device has an open
drain output.
In case of a push pull output stage it is recommended to use a series resistor in the MODE/DATA line to limit the
current to 500mA in case of an accidentally requested acknowledge to protect the internal ACKN-MOSFET.
Copyright 2006–2010, Texas Instruments Incorporated
19
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS62420DRCR | 功能描述:直流/直流開關調節器 Dual Adj 600mA & 1000mA 2.25MHz RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62420DRCRG4 | 功能描述:直流/直流開關調節器 Dual Adj 600mA & 1000mA 2.25MHz RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62420DRCT | 功能描述:直流/直流開關調節器 Dual Adj 600mA & 1000mA 2.25MHz RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62420DRCT | 制造商:Texas Instruments 功能描述:DC/DC Converter IC 制造商:Texas Instruments 功能描述:IC, DUAL STEP-DOWN CONVERTER, SON-10 |
| TPS62420DRCTG4 | 功能描述:直流/直流開關調節器 Dual Adj 600mA & 1000mA 2.25MHz RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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