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参数资料
| 型号： | MAX5051EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/21页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX5051 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，隔离 |
| 输出电压： | 3.3V |
| 电流 - 输出： | 15A |
| 输入电压： | 36 ~ 72V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 250kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX5051 |
Parallelable, Clamped Two-Switch
Power-Supply Controller IC
V IN+
D4
MA111CT
R6
47 ?
C11
R9
15k ?
C8
4.7 μ F
R5
10 ?
D3
BAT46W
0.1 μ F
R12
1M ?
C12
220nF
FLTINT
GND
XFRMRH
DRVDD
C7
4.7 μ F
N1
SI4486
C5
1 μ F
T1
L M : 150 μ H
P: 14T
S: 4T
T: 6T
fs = 250kHz
D1
L1
C13
100pF
C14
390pF
RCOSC
STARTUP
RCFF
CON
MAX5051
DRVH
DRVB
DRVL
N3
BSS123
USED FOR
BOOST
CAPACITOR
PRECHARGE
N2
SI4486
T1
D5
2 μ H
C4
3 x 270 μ F
3.3V
10A
R LOAD
CS
D2
COMP
PGND
B2100
R13
100k ?
R14
24.9k ?
R4
28m ?
R3
475 ?
U2
C3
150nF
R8
R15
1M ?
R11
39.2k ?
R10
10 ?
C10
4.7 μ F
C9
1 μ F
2.2k ?
R7
360 ?
PS2913
C2
C1
47nF
R1
11.5k ?
V IN-
C6
270nF
220nF
MAX8515
R2
2.55k ?
Figure 2. Typical Application Circuit
If the charge stored on the boost capacitor is not ade-
quately replenished then the gate-driver lockout for the
high-side MOSFET is triggered, stopping the high side
from switching. The low side continues switching, even-
I BST
BST
I BST
tually recharging the capacitor, at which point the high
side starts switching again. To prevent this behavior,
I GD
DRVH
use the boost capacitor ’ s cycle-by-cycle charging cir-
cuit to prevent unwanted shutdowns of the high side
XFMRH
I LM
(Figure 2). Connect the gate of a small high-voltage
V IN
REG9
L M
FET (with the same voltage rating or higher as the main
FETs) to the DRVB output of the MAX5051. Connect the
drain of this FET to XFRMRH, and connect the source
to the primary ground. DRVB will briefly (300ns) turn
this FET ON every cycle after the main PWM clock ter-
minates. This allows the boost capacitor to be replen-
ished under all conditions, even when switching stops
completely. A suitable FET for this is BSS123 or equiva-
lent (100V, 170mA rated). The boost-capacitor charge
DRVL
Figure 3. Boost Capacitor Charging Path During Transformer
Reset
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5052 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies |
| MAX5052AEUA | 功能描述:电流型 PWM 控制器 w/Error Amplifier RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5052AEUA+ | 功能描述:电流型 PWM 控制器 w/Error Amplifier RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5052AEUA+T | 功能描述:电流型 PWM 控制器 w/Error Amplifier RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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