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参数资料
| 型号： | TEA1612T |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封装： | 7.50 MM, PLASTIC, MS-013, SOT137-1, SOP-24 |
| 文件页数： | 16/19页 |
| 文件大小： | 108K |
| 代理商： | TEA1612T |
TEA1612T_1
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 24 September 2009
6 of 19
NXP Semiconductors
TEA1612T
Zero voltage switching resonant converter controller
7.2 Oscillator
The internal oscillator is a current-controlled oscillator that generates a sawtooth output.
The frequency of the sawtooth is determined by the external capacitor Cf and the currents
owing into the IFS and IRS pins.
The minimum frequency and the non-overlap time are set by the capacitor Cf and
The oscillator frequency is exactly twice the bridge frequency to achieve an accurate 50 %
duty factor. An overview of the oscillator and driver signals is given in Figure 5.
7.3 Non-overlap time resistor
The non-overlap time resistor Rno is connected between the 3 V reference pin VREF, and
the IFS current input pin (see Figure 7). The voltage on the IFS pin is kept constant at a
temperature independent value of 0.6 V. The current that ows into the IFS pin is
determined by resistor's Rno 2.4 V voltage drop divided by its value. The IFS input current
equals 1/16 of the discharge current of capacitor Cf and determines the falling slope of the
oscillator.
The falling slope time is used to create a non-overlap time (tno) between two successive
switching actions of the half-bridge switches:
7.4 Minimum frequency resistor
The Rf(min) resistor is connected between the VREF pin (3 V reference voltage) and the
IRS current input pin (held at a temperature independent voltage level of 0.6 V). The
charge current of the capacitor Cf is twice the current owing into the IRS pin.
Fig 5.
Oscillator and driver signals
014aaa685
t
non-overlap time (high to low)
non-overlap time (low to high)
CF
GL
0
GH-SH
I
IFS
2.4V
R
no
-----------
=
t
no
C
f
V
Cf
×
16
I
×
IFS
--------------------------
=
t
IFS
t
no
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TEA1612T/N1,518 | 功能描述:交流/直流开关转换器 IC RESONANT CONV CTRLR RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| TEA1613T/N1,518 | 功能描述:交流/直流开关转换器 IC CTLR RESONANT CONV RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| TEA1620P | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:STARplug |
| TEA1620P/N1,112 | 功能描述:开关变换器、稳压器与控制器 STARPLUG SMPS CNTRLR 48 OHM RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| TEA1622P | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:STARplugTM |
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