- 您现在的位置：买卖IC网 > PDF目录22130 > SI9120DJ-E3 (Vishay Siliconix)IC CTRLR UNIV SWMODE 16DIP PDF资料下载
参数资料
| 型号： | SI9120DJ-E3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 5/10页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR UNIV SWMODE 16DIP |
| 标准包装： | 500 |
| 输出隔离： | 隔离 |
| 频率范围： | 40kHz ~ 1MHz |
| 输入电压： | 9.5 V ~ 13.5 V |
| 输出电压： | 4V |
| 功率（瓦特）： | 750mW |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 16-PDIP |
| 包装： | 散装 |
Si9120
Vishay Siliconix
PIN CONFIGURATIONS AND ORDERING INFORMATION
Dual-In-Line
SOIC
+V IN
NC*
NC*
SENSE
OUTPUT
? V IN
V CC
OSC OUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
BIAS
FB
COMP
RESET
SHUTDOWN
V REF
DISCHARGE
OSC IN
+V IN
SENSE
OUTPUT
? V IN
V CC
OSC OUT
1
4
5
6
7
8
16
15
14
13
12
11
10
9
BIAS
FB
COMP
RESET
SHUTDOWN
V REF
DISCHARGE
OSC IN
Top View
Top View
Note: Pins 2 and 3 are removed
ORDERING INFORMATION
Part Number
Si9120DY
Temperature Range
Package
Si9120DY-T1
Si9120DY-T1—E3
Si9120DJ
Si9120DJ—E3
DETAILED DESCRIPTION
? 40 to 85 _ C
SOIC-16
PDIP-16
Pre-Regulator/Start-Up Section
Due to the low quiescent current requirement of the Si9120
control circuitry, bias power can be supplied from the
unregulated input power source, from an external regulated
low-voltage supply, or from an auxiliary “bootstrap” winding on
the output inductor or transformer.
When power is first applied during start-up, +V IN (pin 1) will
draw a constant current. The magnitude of this current is
determined by a high-voltage depletion MOSFET which is
connected between +V IN and V CC (pin 7). This start-up
circuitry provides initial power to the IC by charging an external
bypass capacitance connected to the V CC pin. The constant
current is disabled when V CC exceeds 8.6 V. If V CC is not
forced to exceed the 8.6-V threshold, then V CC will be
regulated to a nominal value of 8.6 V by the pre-regulator
circuit.
As the supply voltage rises toward the normal operating
conditions, an internal undervoltage (UV) lockout circuit keeps
the output driver disabled until V CC exceeds the undervoltage
lockout threshold (typically 8.1 V). This guarantees that the
Document Number: 70006
S-42042—Rev. H, 15-Nov-04
control logic will be functioning properly and that sufficient gate
drive voltage is available before the MOSFET turns on. The
design of the IC is such that the undervoltage lockout threshold
will be at least 300 mV less than the pre-regulator turn-off
voltage. Power dissipation can be minimized by providing an
external power source to V CC such that the constant current
source is always disabled.
Note: When driving large MOSFETs at high frequency without
a bootstrap V CC supply, power dissipation in the pre-regulator
may exceed the power rating of the IC package. For operation
of +V IN > 250 V, a 10-k W , 1 / 4 -W resistor should be placed in
series with +V IN (Pin 1). For +V IN > 380 V, a 15-k W , 1 / 4 -W
resistor is recommended.
BIAS
To properly set the bias for the Si9120, a 390-k W resistor
should be tied from BIAS (pin 16) to ? V IN (pin 6). This
determines the magnitude of bias current in all of the analog
sections and the pull-up current for the SHUTDOWN and
RESET pins. The current flowing in the bias resistor is
nominally 15 m A.
www.vishay.com
5
相关PDF资料 |
PDF描述 |
|---|---|
| R2S8-243.3/P | CONV DC/DC 2W 24VIN 3.3VOUT SMD |
| LC4032V-75TN48I | IC CPLD 32MACROCELLS 48TQFP |
| TAP224K035SRW | CAP TANT 0.22UF 35V 10% RADIAL |
| GAL16V8D-7LPN | IC PLD 8MACRO 5.0V 7.5NS 20PDIP |
| GSA36DTAZ-S273 | CONN EDGECARD 72POS R/A .125 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SI9120DY | 功能描述:电流型 PWM 控制器 Univ Input Controllr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| SI9120DY (AT642AC) | 制造商:. 功能描述: |
| SI9120DY-E3 | 功能描述:电流型 PWM 控制器 Univ-Input Swmode Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| SI9120DY-T1 | 功能描述:电流型 PWM 控制器 Univ-Input Swmode Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| SI9120DY-T1-E3 | 功能描述:电流型 PWM 控制器 Univ-Input Swmode Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
发布紧急采购，3分钟左右您将得到回复。