參數(shù)資料
型號(hào)： ICE3A1065L
廠商： INFINEON TECHNOLOGIES AG
英文描述： Off-Line SMPS Current Mode Controller with integrated 650V Startup Cell/Depletion CoolMOS⑩ and Latched off Mode
中文描述： 離線式開(kāi)關(guān)電源電流模式控制器，集成了?650V啟動(dòng)細(xì)胞/消耗的CoolMOS⑩和鎖存關(guān)閉模式
文件頁(yè)數(shù)： 9/28頁(yè)
文件大?。?/td> 525K
代理商： ICE3A1065L
CoolSET-F3
ICE3xxx65L
Functional Description
Version 2.0
9
8 May 2006
3.4
PWM Section
Figure 6
PWM Section Block
3.4.1
The oscillator generates a fixed frequency. The
switching frequency for ICE3Axx65L is f
OSC
= 100kHz
and ICE3Bxx65L is f
= 67kHz. A resistor, a
capacitor and a current source and current sink which
determine the frequency are integrated. The charging
and discharging current of the implemented oscillator
capacitor are internally trimmed, in order to achieve a
very accurate switching frequency. The ratio of
controlled charge to discharge current is adjusted to
reach a maximum duty cycle limitation of D
max
=0.72.
Oscillator
3.4.2
The oscillator clock output provides a set pulse to the
PWM-Latch when initiating the internal CoolMOS
conduction. After setting the PWM-Latch can be reset
by the PWM comparator, the Soft Start comparator or
the Current-Limit comparator. In case of resetting, the
driver is shut down immediately.
PWM-Latch FF1
3.4.3
Gate Driver
Figure 7
Gate Driver
The driver-stage is optimized to minimize EMI and to
provide high circuit efficiency. This is done by reducing
the switch on slope when exceeding the internal
CoolMOS threshold. This is achieved by a slope
control of the rising edge at the driver’s output (see
Figure 8).
Figure 8
Gate Rising Slope
Thus the leading switch on spike is minimized. When
the integrated CoolMOS is switched off, the falling
shape of the driver is slowed down when reaching 2V
to prevent an overshoot below ground. Furthermore the
driver circuit is designed to eliminate cross conduction
of the output stage.
During powerup when VCC is below the undervoltage
lockout threshold V
VCCoff
, the output of the Gate Driver
is low to disable power transfer to the secondary side.
Oscillator
Duty Cycle
max
Gate Driver
0.72
Clock
&
G9
1
G8
PWM Section
FF1
R
S
Q
Soft Start
Comparator
PWM
Comparator
Current
Limiting
Internal
CoolMOS
Gate
VCC
1
PWM-Latch
CoolMOS
Gate Driver
Gate
t
(internal) V
Gate
5V
ca. t = 130ns
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICE3A1065LJ 功能描述:電流型 PWM 控制器 CoolSET F3 650V RoHS:否 制造商:Texas Instruments 開(kāi)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
ICE3A1065LJHKLA1 制造商:Infineon Technologies AG 功能描述:Current Mode PWM Controller 650V 1A 8-Pin PDIP 制造商:Infineon Technologies AG 功能描述:IC OFFLINE CTRLR SMPS OTP 8DIP
ICE3A1065LXK 制造商:Infineon Technologies AG 功能描述:Current Mode PWM Controller 8-Pin PDIP
ICE3A1065XK 制造商:Infineon Technologies AG 功能描述:Current Mode PWM Controller 650V 1A 8-Pin PDIP
ICE3A1565 功能描述:電流型 PWM 控制器 Off-Line SMPS Currnt Mode CTRLR 650V RoHS:否 制造商:Texas Instruments 開(kāi)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
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