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參數(shù)資料
| 型號： | ISL6740 |
| 廠商： | Intersil Corporation |
| 英文描述： | Flexible Double Ended Voltage and Current Mode PWM Controllers |
| 中文描述： | 靈活的雙端電壓和電流模式PWM控制器 |
| 文件頁數(shù)： | 10/29頁 |
| 文件大?。?/td> | 639K |
| 代理商： | ISL6740 |
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10
Pin Descriptions
V
DD
-
V
DD
is the power connection for the IC. To optimize
noise immunity, bypass V
DD
to GND with a ceramic
capacitor as close to the V
DD
and GND pins as possible.
The total supply current, I
DD
, will be dependent on the load
applied to outputs OUTA and OUTB. Total I
DD
current is the
sum of the quiescent current and the average output current.
Knowing the operating frequency, Fsw, and the output
loading capacitance charge, Q, per output, the average
output current can be calculated from:
SYNC -
A bidirectional synchronization signal used to
coordinate the switching frequency of multiple units.
Synchronization may be achieved by connecting the SYNC
signal of each unit together or by using an external master
clock signal. The oscillator timing capacitor, C
T
, is always
required regardless of the synchronization method used.
The paralleled unit with the highest oscillator frequency
assumes control.
R
TC
-
This is the oscillator timing capacitor charge current
control pin. A resistor is connected between this pin and
GND. The current flowing through the resistor determines
the magnitude of the charge current. The charge current is
nominally twice this current. The PWM maximum ON time is
determined by the timing capacitor charge duration.
R
TD
-
This is the oscillator timing capacitor discharge current
control pin. A resistor is connected between this pin and
GND. The current flowing through the resistor determines
the magnitude of the discharge current. The discharge
current is nominally 50x this current. The PWM deadtime is
determined by the timing capacitor discharge duration.
C
T
-
The oscillator timing capacitor is connected between
this pin and GND.
V
ERROR
-
The inverting input of the PWM comparator. The
error voltage is applied to this pin to control the duty cycle.
Increasing the signal level increases the duty cycle. The
node may be driven with an external error amplifier or opto-
coupler.
Typical Performance Curves
FIGURE 1. REFERENCE VOLTAGE vs TEMPERATURE
FIGURE 2. OSCILLATOR CT DISCHARGE CURRENT GAIN
FIGURE 3. DEADTIME (TD) vs CAPACITANCE
FIGURE 4. CAPACITANCE vs FREQUENCY
1.001
1
0.999
0.998
0.997
-40
-25
-10
5
20
35
50
65
80
95
110
TEMPERATURE (°C)
N
R
65
60
55
50
45
400
50
100
150
200
250
300
350
400
450
500
RTD CURRENT (μA)
C
110
4
110
3
100
10
10
20
30
40
50
60
70
80
90
100
RTD (k
)
D
470
330
220
100
CT (pF) =
1000
680
110
6
110
4
60
70
80
90
100
RTC (k
)
F
10
20
30
40
50
680
1000
330
470
220
100
CT (pF) =
RTD = 10K
110
5
I
OUT
2
Q
F
SW
=
A
(EQ. 1)
ISL6740, ISL6741
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6740IB | Flexible Double Ended Voltage and Current Mode PWM Controllers |
| ISL6740IV | Octal Buffers/Drivers With 3-State Outputs 20-SSOP -40 to 85 |
| ISL6741 | Flexible Double Ended Voltage and Current Mode PWM Controllers(靈活的雙端電壓和電流模式PWM控制器) |
| ISL6845IB | Improved Industry Standard Single Ended Current Mode PWM Controller |
| ISL6845 | Improved Industry Standard Single Ended Current Mode PWM Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6740AIVZA | 功能描述:IC REG CTRLR PWM VM 16-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6740AIVZA-T | 功能描述:IC REG CTRLR PWM VM 16-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6740EVAL1 | 功能描述:EVALUATION BOARD 1 ISL6740 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6740EVAL2 | 功能描述:EVALUATION BOARD 2 ISL6740 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時(shí)/停產(chǎn)零件編號 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| ISL6740EVAL2Z | 功能描述:EVALUATION BOARD 2 ISL6740 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
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