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參數(shù)資料
| 型號： | MAX680 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Octal Buffers And Line Drivers With 3-State Outputs 20-CDIP -55 to 125 |
| 中文描述： | +5V至±10V電壓變換器 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 84K |
| 代理商： | MAX680 |
M
+5V to ±10V Voltage Converters
4
_______________________________________________________________________________________
_______________Detailed Desc ription
The MAX681 contains all circuitry needed to implement
a dual charge pump. The MAX680 needs only four
capacitors. These may be inexpensive electrolytic
capacitors with values in the 1μF to 100μF range. The
MAX681 contains two 1.5μF capacitors as C1 and C2,
and two 2.2μF capacitors as C3 and C4. See Typical
Operating Characteristics.
Figure 2a shows the idealized operation of the positive
voltage converter. The on-chip oscillator generates a
50% duty-cycle clock signal. During the first half of the
cycle, switches S2 and S4 are open, S1 and S3 are
closed, and capacitor C1 is charged to the input volt-
age V
CC
. During the second half-cycle, S1 and S3 are
open, S2 and S4 are closed, and C1 is translated
upward by V
CC
volts. Assuming ideal switches and no
load on C3, charge is transferred onto C3 from C1 such
that the voltage on C3 will be 2V
CC
, generating the
positive supply.
Figure 2b shows the negative converter. The switches
of the negative converter are out of phase from the pos-
itive converter. During the second half of the clock
cycle, S6 and S8 are open and S5 and S7 are closed,
charging C2 from V+ (pumped up to 2V
CC
by the posi-
tive charge pump) to GND. In the first half of the clock
I
L
+
R
L
+
R
L
-
I
L
-
MAX680
4.7
μ
F
V
CC
IN
C3
10
μ
F
V+ OUT
V- OUT
GND
C4
10
μ
F
C2
4.7
μ
F
C1-
8
7
6
5
C2+
V-
V+
1
2
3
4
C1+
V
CC
GND
C2-
V
CC
a)
b)
S1
S3
8kHz
C1+
C1
C3
C1-
S2
S4
S5
S6
S7
S8
C2-
GND
V-
R
L
-
R
L
+
C2+
C4
C2
GND
V
CC
I
L
-
V+
GND
I
L
+
V+
Figure 1. Test Circuit
Figure 2. Idealized Voltage Quadrupler: a) Positive Charge Pump; b) Negative Charge Pump
相關PDF資料 |
PDF描述 |
|---|---|
| MAX680-MAX681 | +5V to 【10V Voltage Converters |
| MAX680CPA | 8-Bit Binary Counters With Input Registers 20-LCCC -55 to 125 |
| MAX680EPA | 8-Bit Binary Counters With Input Registers 16-CDIP -55 to 125 |
| MAX680ESA | 8-Bit Binary Counters With Input Registers 16-CFP -55 to 125 |
| MAX681CPD | 8-Bit Shift Registers With Output Latches 16-CDIP -55 to 125 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6800UR26D1 | 制造商:Maxim Integrated Products 功能描述:3-PIN LOW-POWER MICROPROCESSOR RES - Rail/Tube |
| MAX6800UR26D1+T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6800UR26D1-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6800UR26D2 | 制造商:Maxim Integrated Products 功能描述:3-PIN LOW-POWER MICROPROCESSOR RES - Rail/Tube |
| MAX6800UR26D2+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.63V 5UA 3PIN SOT-23 - Rail/Tube |
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