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參數(shù)資料
| 型號： | IR3621M |
| 廠商： | International Rectifier |
| 英文描述： | 2-PHASE / DUAL SYNCHRONOUS PWM CONTROLLER WITH OSCILLATOR SYNCHRONIZATION AND PRE-BIAS STARTUP |
| 中文描述： | 2相/雙同步PWM控制器，帶有振蕩器同步操作和預(yù)偏置啟動 |
| 文件頁數(shù)： | 5/29頁 |
| 文件大小： | 389K |
| 代理商： | IR3621M |
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IR3621 & (PbF)
5
www.irf.com
PIN DESCRIPTIONS
1
2
3
4
5,23
6,22
7,21
8
20
9,19
10,18
11,17
12,16
13,15
14
24
25
26
27
28
Power Good pin. Low when any of the outputs fall 10% below the set voltages.
Supply voltage for the internal blocks of the IC. The Vcc slew rate should be
<0.1V/us.
Output of the internal LDO. Connect a 1.0uF capacitor from this pin to ground.
Connecting a resistor from this pin to ground sets the oscillator frequency.
Sense pins for OVP and PGood. For current share tie these pins together.
Inverting inputs to the error amplifiers. In current sharing mode, Fb1 is con-
nected to a resistor divider to set the output voltage and Fb2 is connected to
programming resistor to achieve current sharing. In independent 2-channel mode,
these pins work as feedback inputs for each channel.
Compensation pins for the error amplifiers.
These pins provide user programmable soft-start function for each outputs.
Connect external capacitors from these pins to ground to set the start up time
for each output. These outputs can be shutdown independently by pulling the
respective pins below 0.3V. During shutdown both MOSFETs will be turned off.
For current share mode SS2 must be floating.
A resistor from these pins to switching point will set current limit threshold.
Supply voltage for the high side output drivers. These are connected to voltages
that must be typically 6V higher than their bus voltages. A 0.1
μ
F high fre-
quency capacitor must be connected from these pins to PGND to provide peak
drive current capability.
Output drivers for the high side power MOSFETs.
Note3
These pins serve as the separate grounds for MOSFET drivers and should be
connected to the system’s ground plane.
Output drivers for the synchronous power MOSFETs.
Supply voltage for the low side output drivers.
The internal oscillator can be synchronized to an external clock via this pin.
When pulled High, it puts the device current limit into a hiccup mode. When
pulled Low, the output latches off, after an overcurrent event.
Non-inverting input to the second error amplifier. In the current sharing mode, it
is connected to the programming resistor to achieve current sharing. In inde-
pendent 2-channel mode it is connected to V
REF
pin when Fb2 is connected to
the resistor divider to set the output voltage.
Reference Voltage. The drive capability of this pin is about 2
μ
A.
Analog ground for internal reference and control circuitry.
No Connect
TSSOP MLPQ PIN SYMBOL PIN DESCRIPTION
29
30
Vcc
31
1
2,22
3,21
4,20
5
19
6,18
7,17
8,16
10,14
11,13
12
23
24
26
27
28
9,15,25.32
PGood
V
OUT3
Rt
V
SEN2
, V
SEN1
Fb2,Fb1
Comp2, Comp1
SS2 / SD
SS1 / SD
OCSet2,OCSet1
VcH2, VcH1
HDrv2, HDrv1
PGnd2, PGnd1
LDrv2, LDrv1
V
CL
Sync
Hiccup
V
P2
V
REF
Gnd
N/C
Note3:
The negative voltage at these pins may cause instability for the gate drive circuits. To prevent this, a low
forward voltage drop diode (Schottky) is required between these pins and power ground.
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| IR3621MTR | 功能描述:IC REG CTRLR BUCK PWM VM 32MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| IR3621MTRPBF | 功能描述:DC/DC 開關(guān)控制器 2-PHASE DUAL SYNC PWM CTRLLER RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| IR3621PBF | 制造商:IRF 制造商全稱:International Rectifier 功能描述:2-PHASE / DUAL SYNCHRONOUS PWM CONTROLLER WITH OSCILLATOR SYNCHRONIZATION AND PRE-BIAS STARTUP |
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