Datasheet > DPA423G

DPA423G

更新时间： 2024-02-08 14:40:53

品牌	Logo	应用领域
帕沃英蒂格盛 - POWERINT		转换器电信开关光电二极管以太网
页数	文件大小	规格书
34页	2832K
描述
Highly Integrated DC-DC Converter ICs for Power over Ethernet & Telecom Applications

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DPA423G 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	SFM
包装说明：	PLASTIC, MO-169-7C, 6 PIN	针数：	6
Reach Compliance Code：	compliant	风险等级：	5.19
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	VOLTAGE-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	75 V
最小输入电压：	16 V	标称输入电压：	40 V
JESD-30 代码：	R-PSSO-G6	JESD-609代码：	e0
长度：	9.4 mm	功能数量：	1
端子数量：	6	最高工作温度：	125 °C
最低工作温度：	-40 °C	最大输出电流：	1.75 A
封装主体材料：	PLASTIC/EPOXY	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	2.054 mm
表面贴装：	YES	切换器配置：	SINGLE
最大切换频率：	425 kHz	技术：	CMOS
温度等级：	AUTOMOTIVE	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	SINGLE	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	8 mm	Base Number Matches：	1

DPA423G 数据手册

DPA422-426

LINE-SENSE (L) Pin Operation

those that control the on/off states of the output such as UV, OV

and remote ON/OFF, the vertical axis represents the enable/

disable states of the output. UV triggers at I_UV(+50 µA typical

with 4 µA hysteresis) and OV triggers at I_OV(+135 µA typical with

4 µA hysteresis). Between the UV and OV thresholds, the

output is enabled. For line feed-forward with DC_MAXreduction,

the vertical axis represents the magnitude of the DC_MAXLine

feed-forward with DC_MAXreduction lowers maximum duty cycle

from 75% at I_L(DC)(+55 µA typical) to 33% at I_OV(+135 µA).

When current is fed into the LINE-SENSE pin, it works as a

voltage source of approximately 2.6 V up to a maximum current

of +240 µA (typical). At +240 µA, this pin turns into a constant

current sink. Refer to Figure 8. In addition, a comparator with a

threshold of 1 V is connected at the pin and is used to detect

when the pin is shorted to the SOURCE pin.

There are a total of ﬁve functions available through the use of

the LINE-SENSE pin: OV, UV, line feed-forward with DC_MAX

reduction, remote ON/OFF and synchronization. Shorting the

LINE-SENSE pin to the SOURCE pin disables all ﬁve functions.

The LINE-SENSE pin is typically used for line sensing by

connecting a resistor from this pin to the positive input DC

voltage bus to implement OV, UV and line feed-forward with

DC_MAXreduction over line voltage. In this mode, the value of the

resistor determines the line OV/UV thresholds, and the DC_MAXis

reduced linearly with input DC high-voltage starting from just

above the UV threshold. This pin can also be used as the input

pin for remote ON/OFF and synchronization. An external

transistor placed between the LINE-SENSE pin and the

CONTROL pin realizes remote ON/OFF via UV or OV threshold.

Synchronization is available by connecting an open drain

external MOSFET between the LINE-SENSE pin and the

SOURCE pin to generate synchronization pulse. Each time the

MOSFET turns on, the falling edge of the LINE-SENSE pin

voltage initiates a new switching cycle. The lowest

synchronization frequency guaranteed by DPA-Switch is

128 kHz. Refer to Table 2 for possible combinations of the

functions with example circuits shown in Figure 11 through

Figure 24. A description of speciﬁc functions in terms of the

LINE-SENSE pin I/V characteristic is shown in Figure 7 (right

hand side). The horizontal axis represents LINE-SENSE pin

current with positive polarity indicating currents ﬂowing into the

pin. The meaning of the vertical axes varies with functions. For

EXTERNAL CURRENT LIMIT (X) Pin Operation

When current is drawn out of the EXTERNAL CURRENT LIMIT pin,

it works as a voltage source of approximately 1.3 V up to a

maximum current of -230 µA (typical). At -230 µA, it turns into a

constant current source (refer to Figure 8).

There are two functions available through the use of the

EXTERNAL CURRENT LIMIT pin: external current limit and

remote ON/OFF. Shorting the EXTERNAL CURRENT LIMIT pin

and SOURCE pin disables both functions. In high efﬁciency

applications, this pin can be used to reduce the current limit

externally to a value close to the operating peak current, by

connecting the pin to the SOURCE pin through a resistor. The

pin can also be used as a remote ON/OFF control input.

Table 2 shows several different ways of using this pin. See

Figure 7 for a description of the functions where the horizontal

axis (left hand side) represents the EXTERNAL CURRENT LIMIT

pin current. The meaning of the vertical axes varies with

function. For those that control the on/off states of the output

such as remote ON/OFF, the vertical axis represents the enable/

disable states of the output. For external current limit, the

vertical axis represents the magnitude of the I_LIMIT. Please see

graphs in the Typical Performance Characteristics section for

the current limit programming range and the selection of the

appropriate resistor value.

www.powerint.com

Rev. T 12/12

1...6 7 8910 11 12...34

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