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參數(shù)資料
| 型號： | MAX847 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CDIP -55 to 125 |
| 中文描述： | 1節(jié)電池、升壓型、雙向?qū)ず魴C(jī)系統(tǒng)電源IC |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 167K |
| 代理商： | MAX847 |
M
1-Cell, S tep-Up
Two-Way Pager S ystem IC
_______________________________________________________________________________________
7
______________________________________________________________Pin Desc ription
CH0 is compared to a 7-bit DAC that adjusts from 0.2V to 1.27V. The comparison result is sent to the
CH0 OUT register.
CH0
9
Reset Input. Triggers RSO and resets IC when input is below 0.6V. Comparator with hysteresis (18mV).
Low-Battery Input. Triggers LBO and internal serial bit.
RSIN
LBI
10
11
An external RC network sets the PLL loop response (at SYNC) to adjust frequency lock time versus jit-
ter: 1nF
II
(22nF + 10k
). Connect to REF when SYNC is not used.
FILT
12
Sync Input for PWM Switch Rate. A 38.4kHz input results in a 268.8kHz PWM rate (7 times the sync
frequency).
SYNC
13
Serial Clock for SPI Interface
Open-Drain Output for LBI Comparator
SCL
LBO
5
6
Reset Output. Open drain goes low when RSIN drops below 0.6V. All serial registers are reset (or set)
to POR state as well.
RSO
7
1.28V Reference. Bypass with a 1μF capacitor.
REF
8
Power Ground. Source of LX1 NFET.
PGND
4
Serial Data Output for SPI Interface
SDO
3
PIN
Serial Data Input for SPI Interface
SDI
2
Connect LX1 to the inductor. LX1 is internally connected to an NFET that switches to PGND and a PFET
that switches to OUT.
LX1
1
FUNCTION
NAME
Resistor sets offset between OUT (or REG1 or any other point) and REG2. R
OFS
= 15k
results in
150mV.
Analog Ground
Ground for DR1 and DR2 FET Sources
Open-Drain FET Switch. Activated via the serial-interface bit.
Logic Input. ANDed with the DR2ON bit to control the DR2 switch.
Open-Drain FET. On via AND of the DR2ON bit and the DR2IN pin.
1V, 2mA Regulator Output. On via the serial interface. Low noise.
24mA REG2 Output. Linearly regulated to the voltage at the OFS pin (voltage difference =
10μA
·
R
OFS
). REG2 isolates noise.
REG2 Input. Connect to OUT, REG1, or another voltage source.
OFS
14
AGND
DRGND
DR1
DR2IN
DR2
REG3
15
16
17
18
19
20
REG2
21
R2IN
22
15mA or 1mA Settable Charge Current from OUT to 3-Cell NICD Stack. When the NICD_REG_ON bit is
set (Table 2), NICD becomes an input to the linear regulator at OUT, and the DC-DC converter is off.
NICD
23
PFET output connected to OUT. Output is clamped such that it cannot rise above 3.3V, regardless of
the voltage set at OUT.
REG1
24
DC-DC Converter Output and Feedback Point. Digitally controlled from 1.8V to 4.9V in 100mV steps
(Table 6).
OUT
25
Positive Connection to Battery. The IC is powered from OUT.
BATT
26
Chip Select for SPI Serial Interface
CS
27
Run/Coast. Permits toggling between Run and Coast Modes via logic signal. Run is selected when
either RUN or the internal RUN/COAST bit is high. Coast is selected when both are low.
RUN
28
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX847EEI | 功能描述:電池管理 1 Cell Step-Up 2-Way Pager System IC RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX847EEI+ | 功能描述:電池管理 1 Cell Step-Up 2-Way Pager System IC RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX847EEI+T | 功能描述:電池管理 1 Cell Step-Up 2-Way Pager System IC RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX847EEI-C70955 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX847EEI-T | 功能描述:電池管理 1 Cell Step-Up 2-Way Pager System IC RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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