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參數(shù)資料
| 型號： | MAX5069C |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers |
| 中文描述： | 高頻率，電流模式PWM控制器，具有精確的振蕩器和雙FET驅(qū)動器 |
| 文件頁數(shù)： | 10/19頁 |
| 文件大小： | 236K |
| 代理商： | MAX5069C |
M
Undervoltage Loc kout
The MAX5069 features an input voltage UVLO/EN func-
tion to enable the PWM controller before any operation
can begin. The MAX5069A/D shut down if the voltage
at UVLO/EN falls below its 1.18V threshold. The
MAX5069B/C also incorporate a UVLO hysteresis input
to set the desired turn-off voltage.
MAX5069A/D UVLO Adjustment
The MAX5069A/D have an input voltage UVLO/EN with
a 1.231V threshold. Before any operation can com-
mence, the UVLO/EN voltage must exceed the 1.231V
threshold. The UVLO circuit keeps the PWM compara-
tor, ILIM comparator, oscillator, and output drivers shut-
down to reduce current consumption (see the
Functional Diagram)
.
Calculate R6 in
Figure
2 by using the following formula:
where V
ULR2
is the UVLO/EN’s 1.231V rising threshold
and V
ON
is the desired startup voltage. Choose an R7
value in the 20k
range.
After a successful startup, the MAX5069A/D shut down
if the voltage at UVLO/EN drops below its 1.18V fall-
ing threshold.
MAX5069B/C UVLO with
Programmable Hysteresis
In addition to programmable undervoltage lockout dur-
ing startup, the MAX5069B/C incorporate a UVLO/EN
R
V
V
R
ON
ULR
6
1
7
2
×
=
High-Frequenc y, Current-Mode PWM Controller
with Ac c urate Osc illator and Dual FET Drivers
10
______________________________________________________________________________________
MAX5069B
IN
NDRVA
NDRVB
HYST
UVLO/EN
CS
COMP
V
CC
AGND PGND
REG5
RT
FB
DT
FLTINT
R1
C1
Q1
Q2
V
IN
C2
C3
C4
R3
R4
R9
R2
R8
V
OUT
SCOMP
C5
C7
D1
D3
D2
R5
C6
R10
R6
R
HYST
R7
Figure
1. Nonisolated Power Supply with Programmable Input Supply Voltage
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PDF描述 |
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| MAX5069D | High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers |
| MAX5069DAUE | High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers |
| MAX5069CAUE | High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers |
| MAX5069A | MAX5069A Evaluation Kit |
| MAX5069AEVKIT | MAX5069A Evaluation Kit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5069CAUE | 功能描述:電流型 PWM 控制器 High-Frequency Current-Mode PWM RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX5069CAUE+ | 功能描述:電流型 PWM 控制器 High-Frequency Current-Mode PWM RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX5069CAUE+T | 功能描述:電流型 PWM 控制器 High-Frequency Current-Mode PWM RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX5069CAUE-T | 功能描述:電流型 PWM 控制器 High-Frequency Current-Mode PWM RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX5069D | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers |
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