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參數(shù)資料
| 型號(hào)： | IRU3034 |
| 廠商： | International Rectifier |
| 英文描述： | 8-PIN PWM SWITCHER CONTROLLER IC WITH CURRENT LIMITING |
| 中文描述： | 8引腳的PWM開(kāi)關(guān)控制器芯片，限流 |
| 文件頁(yè)數(shù)： | 3/12頁(yè) |
| 文件大?。?/td> | 159K |
| 代理商： | IRU3034 |
IRU3034 & (PbF)
3
www.irf.com
PIN DESCRIPTIONS
BLOCK DIAGRAM
Figure 2 - Simplified block diagram of the IRU3034.
The PWM output of the switching controller. This pin is a totem pole drive that is con-
nected to the gate of the power MOSFET. A resistor may be placed from this pin to the
gate in order to reduce switching noise.
This pin supplies the voltage to the PWM drive and hysteresis circuitry and it is connected
to the 12V supply. A 1
μ
F, high frequency capacitor must be connected from this pin to
ground to provide the peak current for charging and discharging of the MOSFET.
A resistor divider from this pin to the output of the switching regulator and ground sets the
Core supply voltage.
A resistor and a 10pF capacitor is connected from this pin to the V
FB
pin to set the output
ripple voltage for the switching regulator.
This pin is connected to the IC substrate and must be connected to the lowest potential in
the system.
This pin is connected to the minus side of the external current sense resistor. An internal
current source together with an external resistor in series with this pin programs the
current limit threshold voltage. This voltage divided by the external current sense resistor
sets the current limit threshold.
This pin is connected to the plus side of the external current sense resistor. A resistor in
series with this pin and a capacitor connected between this pin and pin 6 provides a high
frequency filtering for the noise spikes of turn on and turn off switching.
This pin provides the soft-start for the regulator during power up. It also sets a long off time
when the converter goes into current limiting, providing low duty cycle for the catch diode
allowing it to survive during short circuit.
PIN # PIN SYMBOL PIN DESCRIPTION
1
Drv
2
3
4
5
6
7
8
V
12
V
FB
V
HYST
Gnd
CS-
CS+
SS
V
REF
UVLO
1.25V
PWM Control
V
12
2
V
HYST
4
CS+
7
Drv
1
Gnd
5
V
FB
3
CS-
6
SS
8
5V Reg
S.S. / Hiccup
Control
20uA
R
3R
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參數(shù)描述 |
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| IRU3034CS | 功能描述:IC CTRL/REG PWM SWITCH 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調(diào)至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:30-TSSOP 包裝:帶卷 (TR) |
| IRU3034CSPBF | 制造商:International Rectifier 功能描述:PWM CONTROLLER SMD 3034 SOIC8 |
| IRU3034CSTR | 功能描述:IC CNTRL PWM SYNC SWITCH 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調(diào)至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:30-TSSOP 包裝:帶卷 (TR) |
| IRU3034PBF | 制造商:IRF 制造商全稱:International Rectifier 功能描述:8-PIN PWM SWITCHER CONTROLLER IC WITH CURRENT LIMITING |
| IRU3037 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:8-PIN SYNCHRONOUS PWM CONTROLLER |
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