- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383238 > L6732TR (意法半導(dǎo)體) Adjustable step-down controller with synchronous rectification PDF資料下載
參數(shù)資料
| 型號： | L6732TR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Adjustable step-down controller with synchronous rectification |
| 中文描述： | 可調(diào)式降壓同步整流控制器 |
| 文件頁數(shù)： | 24/33頁 |
| 文件大?。?/td> | 735K |
| 代理商： | L6732TR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當(dāng)前第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁
Application details
L6732
24/33
6.4
Compensation network
The loop is based on a voltage mode control (
Figure 18.
). The output voltage is regulated to the
internal/external reference voltage and scaled by the external resistor divider. The error
amplifier output V
COMP
is then compared with the oscillator triangular wave to provide a pulse-
width modulated (PWM) with an amplitude of V
IN
at the PHASE node. This waveform is filtered
by the output filter. The modulator transfer function is the small signal transfer function of V
OUT
/
V
COMP
. This function has a double pole at frequency F
LC
depending on the L-C
OUT
resonance
and a zero at FESR depending on the output capacitor's ESR. The DC Gain of the modulator is
simply the input voltage V
IN
divided by the peak-to-peak oscillator voltage: V
OSC
.
The compensation network consists in the internal error amplifier, the impedance networks Z
IN
(R3, R4 and C20) and Z
FB
(R5, C18 and C19). The compensation network has to provide a
closed loop transfer function with the highest 0dB crossing frequency to have fastest transient
response (but always lower than fsw/10) and the highest gain in DC conditions to minimize the
load regulation error. A stable control loop has a gain crossing the 0dB axis with -20dB/decade
slope and a phase margin greater than 45°. To locate poles and zeroes of the compensation
networks, the following suggestions may be used:
Modulator singularity frequencies:
●
●
Compensation network singularity frequencies:
Figure 18. Compensation Network
Cout
L
LC
=
1
ω
Cout
ESR
ESR
=
1
ω
(13)
(14)
+
=
19
18
19
18
5
1
1
C
C
C
C
R
P
ω
20
4
2
1
C
R
P
=
ω
(15)
(16)
19
5
1
1
C
R
Z
=
ω
(
)
4
3
20
2
1
R
R
C
Z
+
=
ω
(17)
(18)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6902D013TR | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| L6902D | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| L6910 | ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
| L6910A | ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
| L6910ATR | ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6733 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Advanced modular synchronous PWM controller |
| L6733TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Advanced modular synchronous PWM controller |
| L6738 | 功能描述:電流型 PWM 控制器 Single-Phase SD Cont 5V to 12V bus 1.5V RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| L6738A | 功能描述:電流型 PWM 控制器 Single-phase PWM Light Load EFF RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| L6738ATR | 功能描述:電流型 PWM 控制器 Single Phase PWM CNTRL Light-Load EFF RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。