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参数资料
| 型号： | SI9122DQ-T1-E3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 2/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR ISO PWM VM 20-TSSOP |
| 标准包装： | 3,000 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 750kHz |
| 占空比： | 95% |
| 电源电压： | 10 V ~ 13.2 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
Si9122
Vishay Siliconix
TECHNICAL DESCRIPTION
Si9122 is a voltage mode controller for the half-bridge
topology. With 100 V depletion mode MOSFET capability,
the Si9122 is capable of powering directly from the high
voltage bus to V CC through an external PNP pass transistor,
or may be powered through an external regulator directly
through the V CC pin. With PWM control, Si9122 provides
peak efficiency throughout the entire line and load range. In
order to simplify the traditional secondary synchronous
rectification, Si9122 provides intelligent gate drive signals to
control the secondary MOSFETs. With independent gate
drive signals from the controller, transformer design is no
longer limited by the gate to a source rating of the MOSFETs.
Si9122 provides constant V GS voltage, independent of line
voltage to minimize the gate charge loss as well as
conduction loss. A break-before-make function is included to
DETAILED BLOCK DIAGRAM
prevent shoot through current or transformer shorting.
Adjustable Break-Before-Make time is incorporated into the
IC and is programmable by an external resistor value.
Si9122 is packaged in TSSOP-20 and MLP65-20 packages.
Both TSSOP-20 and MLP65-20 packages are available in
lead (Pb)-free option. In order to satisfy the stringent ambient
temperature requirements, Si9122 is rated to handle the
industrial temperature range of - 40 °C to 85 °C. When a
situation arises which results in a rapid increase in primary
(or secondary current) such as output shorted or start-up
with a large output capacitor, control of the PWM generator
is handed over to the current loop. Monitoring of the load
current is by means of a sense resistor on the primary low-
side switch.
V I N
V CC
R OSC
REG_COMP
Pre-Reg u lator
9.1 V
+
V U V LO
High-Side
Primary
Dri v er
BST
-
Int
D H
V REF
8 . 8 V
L X
V I N DET
V REF
+
-
V U V
V FF
OSC
Lo w -Side
Dri v er
V CC
D L
Ramp
60 k Ω
132 k Ω
+
-
V SD
550 m V
PG N D
EP
SS
Error Amplifier
20 μA
I SS
8V
-
+
V REF
2
+
-
P W M
Comparator
Dri v er
Control
and
Timing
OTP
V CC
SY N C
Dri v er High
V CC
SR H
CS2
CS1
+
-
Peak DET
D u ty Cycle
Control
SR L
O v er C u rrent Protection
Si9122
SY N C
Dri v er Lo w
www.vishay.com
2
G N D
C L_CO N T
Figure 2.
BBM
Document Number: 71815
S-80038-Rev. J, 14-Jan-08
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SI9122E | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers |
| SI9122EDLP-T1-E3 | 功能描述:开关变换器、稳压器与控制器 500kHz DC/DC Controller 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 |
| SI9122EDQ-T1-E3 | 功能描述:开关变换器、稳压器与控制器 500kHz DC/DC Controller 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 |
| SI9123 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Control |
| SI9124 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control |
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