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| 型号： | MAX5059EUI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/25页 |
| 文件大小： | 0K |
| 描述： | IC DRVR SYNC RECT 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 电源 |
| 电流 - 电源： | 2.5mA |
| 电源电压： | 9.3 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
Parallelable Secondary-Side Synchronous Rectifier
Driver and Feedback-Generator Controller ICs
The MOSFET drivers are synchronized to the primary-
side switching by using the BUFIN input. BUFIN
accepts the PWM information from the primary through
a high-speed optocoupler or through a small isolation
pulse transformer. Figures 2 through 6 show the inter-
face details using an optocoupler or a pulse trans-
former with two different kinds of primary-side PWM
controllers.
For proper operation, the MAX5051, MAX5042, and
MAX5043 devices generate a look-ahead signal that
precedes the actual switching of the primary MOSFETs
by a small amount of time, typically less than 100ns.
Additional circuitry may be required when the
MAX5058/MAX5059 are used with other primary-side
controllers not capable of providing a look-ahead signal.
MAX5042
MAX5043
REG5
When BUFIN goes high, QREC goes high and QSYNC
goes low. When BUFIN goes low, QREC goes low and
QSYNC goes high.
The MAX5058/MAX5059 provide improved efficiency at
light loads by allowing discontinuous conduction oper-
ation. A zero-crossing comparator with inputs ZCP and
ZCN monitors the current through the freewheeling
MOSFET using a sense resistor at its source. The free-
wheeling MOSFET is turned off when the inductor cur-
rent is near zero. The actual threshold can be externally
adjusted. The Typical Application Circuit shows one
method for trip-point adjustment using components
R31 and R34.
BUFIN is internally clamped to 4V. Use a voltage-divider,
if necessary, to reduce any external voltage applied to
this pin to less than 4V.
MAX5058
PPWM
BSS84
V REG (5V)
560 Ω
330 Ω
BUFIN
2k Ω
PS9715
PWMNEG
OR EQUIVALENT
GND
HIGH-SPEED
OPTOCOUPLER
Figure 2. Interface of MAX5058 to MAX5042/MAX5043 Using a High-Speed Optocoupler
MAX5042
MAX5043
3.10k Ω
MAX5059
REG5
PPWM
BSS84
MMBT3904
V REG (10V)
560 Ω
330 Ω
BUFIN
PWMNEG
2k Ω
PS9715
OR EQUIVALENT
HIGH-SPEED
OPTOCOUPLER
1 μ F
4.42k Ω
GND
Figure 3. Interface of MAX5059 to MAX5042/MAX5043 Using a High-Speed Optocoupler
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| MAX505ACAG-T | 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| MAX505ACNG | 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
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