- 您现在的位置：买卖IC网 > PDF目录13575 > AOZ5007QI (Alpha & Omega Semiconductor Inc)IC REG BUCK SYNC ADJ 50A 40QFN PDF资料下载
参数资料
| 型号： | AOZ5007QI |
| 厂商： | Alpha & Omega Semiconductor Inc |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 50A 40QFN |
| 标准包装： | 3,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 4.5 V ~ 25 V |
| 输入电压： | 4.5 V ~ 25 V |
| 频率 - 开关： | 200kHz ~ 1.5MHz |
| 电流 - 输出： | 50A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 40-QFN（6x6） |
AOZ5007
This delay is typically 170 ns and intended to prevent
spurious triggering of the tri state mode which may be
caused either by noise induced glitches in the PWM
waveform or slow rise and fall times.
Table 1. PWM Input and Tri State Thresholds
between the two switches is minimized, at the same time
preventing cross conduction across the input bus. The
adaptive circuit also monitors the switching node VSWH
and ensures that transition from one MOSFET to another
always takes place without cross conduction, even under
transient and abnormal conditions of operation.
Thresholds ?
AOZ5007QI
AOZ5007QI-01
V PWMH
3.9V
2V
V PWML
1.0 V
1V
V TRIH
1.3V
1.3V
V TRIL
3.7V
1.75 V
The gate pins GH and GL are brought out on pins 6 and
36 respectively. However these connections are not
made directly to MOSFET gate pads and their voltage
measurement may not reflect the actual gate voltage
Note: See Figure 16 for propagation delays and tri state window.
Diode Mode Emulation of Low Side MOSFET (SMOD)
AOZ5007QI can be operated in the diode emulation or
skip mode using the SMOD pin. This is useful if the
converter has to operate in asynchronous mode during
start up, light load or under pre bias conditions. If SMOD
is taken high, the controller will use the PWM signal as
reference and generate both the high and low side
complementary gate drive outputs with the minimal
delays necessary to avoid cross conduction. When the
pin is taken low the HS FET drive is not affected but
diode emulation mode is activated for the LS FET. See
Table 2 for a comprehensive view of all logic inputs and
corresponding drive conditions.
Table 2. Control Logic Truth Table
applied inside the package. The gate connections are
primarily for functional tests during manufacturing and no
connections should be made to them in the application.
Thermal Shutdown
The module temperature is internally sensed and an
alarm is asserted if it exceeds 150 °C. The alarm is reset
when the temperature cools down to 135 °C. The THDN
is an open drain pin that is pulled to CGND to indicate an
over temperature condition. It may be pulled up to VCIN
through a resistor for monitoring purposes.
PCB Layout Guidelines
AOZ5007 is a high current module rated for operation up
to 1.5 MHz. This requires extremely fast switching
speeds to keep the switching losses and device
temperatures within limits. Having a robust gate driver
integrated in the package helps to minimise the
DISB
L
H
H
H
H
H
SMOD
X
L
L
H
H
H
PWM
X
H
L
Tri State
H
L
GH
L
H
L
L
H
L
GL
L
L
See Note
L
L
H
driver-to-MOSFET gate pad connections without
involving the parasitics of the package or PCB traces.
While excellent switching speeds are achieved,
correspondingly high levels of dv/dt and di/dt will be
observed throughout the power train which requires
careful attention to PCB layout to minimise voltage
spikes and other transients. As with any synchronous
buck converter layout the critical requirement is to
minimise the area of the primary switching current loop,
Note: Diode emulation mode is activated when SMOD pin is held low.
Gate Drives
AOZ5007QI has an internal high current high speed
driver that generates the floating gate drive for the
HS FET and a complementary drive for the LS FET.
Propagation delays between transitions of the PWM
waveform and corresponding gate drives are kept to the
minimum. An internal shoot through protection scheme
ensures that neither MOSFET turns on while the other
one is still conducting, thereby preventing shoot through
condition of the input current. When the PWM signal
makes a transition from H ? L or L ? H, the
corresponding gate drive GH or GL begins to turn off.
The adaptive timing circuit monitors the falling edge of
the gate voltage and when the level goes below 1V, the
complementary gate driver is turned on. The dead time
formed by the HS FET, LS FET and the input bypass
capacitor C in . The PCB design is somewhat simplified
because of the optimized pin out in AOZ5007QI. The
bulk of VIN and PGND pins are located adjacent to each
other and the input bypass capacitors should be placed
as close as possible to these pins. The area of the
secondary switching loop, formed by LS FET, output
inductor and output capacitor C out is the next critical
parameter. The ground plane should be extended and
the negative pins of C out should be returned to it, again
as close as possible to the device pins.
The AOZ5007QI is extremely efficient. MOSFETs in the
package are directly attached to individual exposed pads
to simplify thermal management. Both VIN and VSWH
pads should be attached to large areas of PCB copper.
Thermal reliefs should be avoided to ensure proper heat
Rev. 1.1 October 2011
www.aosmd.com
Page 11 of 16
相关PDF资料 |
PDF描述 |
|---|---|
| EBM36DRYH | CONN EDGECARD 72POS DIP .156 SLD |
| ESM18DRUI | CONN EDGECARD 36POS DIP .156 SLD |
| EYM24DRMT | CONN EDGECARD 48POS .156 WW |
| MAX1833ETT30+T | IC REG BOOST SYNC 3V 0.15A 6TDFN |
| EBA32DTMS | CONN EDGECARD 64POS R/A .125 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AOZ5007QI-01 | 功能描述:IC REG BUCK SYNC ADJ 50A 40QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:1 输出电压:5V，1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:16-QSOP |
| AOZ5019QI | 功能描述:Buck Switching Regulator IC Positive 1 Output 30A 23-VFQFN Exposed Pad 制造商:alpha & omega semiconductor inc. 系列:DrMOS 包装:带卷（TR） 零件状态:有效 功能:降压 输出配置:正 拓扑:降压 输出类型:- 输出数:1 电压 - 输入（最小值）:4.5V 电压 - 输入（最大值）:25V 电压 - 输出（最小值/固定）:- 电压 - 输出（最大值）:- 电流 - 输出:30A 频率 - 开关:200kHz ~ 1.5MHz 同步整流器:是 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:23-VFQFN 裸露焊盘 供应商器件封装:23-QFN（4x4） 标准包装:3,000 |
| AOZ5029QI-5 | 功能描述:MOD SYNC BUCK POWER STAGE 24QFN 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:停產 功能:降压 输出配置:正 拓扑:降压 输出数:1 电压 - 输入（最小值）:4.5V 同步整流器:是 工作温度:-40°C ~ 85°C（TA） 标准包装:3,000 |
| AOZ5038QI | 功能描述:MOD SYNC BUCK POWER STAGE 40A 25 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:在售 类型:MOSFET 配置:单相 电流:50A 电压 - 隔离:- 封装/外壳:31-PowerWFQFN 模块 标准包装:3,000 |
| AOZ5039QI | 功能描述:MOD SYNC BUCK POWER STAGE 35A 25 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:在售 类型:MOSFET 配置:单相 电流:50A 电压 - 隔离:- 封装/外壳:31-PowerWFQFN 模块 标准包装:3,000 |
发布紧急采购，3分钟左右您将得到回复。