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| 型号： | ADP3207CJCPZ-RL |
| 厂商： | ON Semiconductor |
| 文件页数： | 29/32页 |
| 文件大小： | 0K |
| 描述： | IC CTLR SYNC BUCK 7BIT 40-LFCSP |
| 标准包装： | 2,500 |
| 应用： | 控制器，Intel IMVP-6 |
| 输入电压： | 3.3 V ~ 22 V |
| 输出数： | 3 |
| 输出电压： | 0.3 V ~ 1.5 V |
| 工作温度： | -10°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 40-LFCSP-VQ（6x6） |
| 包装： | 带卷 (TR) |
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ADP3207C
Selecting Thermal Monitor Components
For single ? point hot spot thermal monitoring, simply set
R TTSET1 equal to the NTC thermistor ’s resistance at the
alarm temperature (see Figure 30). For example, if the
VRTT alarm temperature is 100 ° C using a Vishey thermistor
(NTHS ? 0603N011003J) with a resistance of 100 k W at
25 ° C, and 6.8 k W at 100 ° C, simply set R TTSET1 = R TH1
(100 ° C) to 6.8 k W .
DC Loadline Setting
3. Measure the output voltage at no load (V NL ). Verify
that it is within tolerance.
4. Measure the output voltage at full load and at cold
(V FLCOLD ). Let the board set for ~10 minutes at
full load and measure the output (V FLHOT ). If there
is a change of more than a few mV, then adjust
R CS1 and R CS2 using Equations 42 and 43.
VCC
31
5.0 V
R CS2(NEW) + R CS2(OLD)
V NL * V FLCOLD
V NL * V FLHOT
(eq. 42)
ADP3207C
R
R TTSET1
5. Repeat Step 4 until cold and hot voltage
measurements remain the same.
VRTT
?
+
R
TTSN
30
C TT
R TH
6. Measure output voltage from no load to full load
using 5 A steps. Compute the load line slope for
each change and then average it to get the overall
load line slope (R OMEAS ).
7. If R OMEAS is off from R O by more than 0.05 m W ,
use the following to adjust the R PH values:
FD
1
)
REF
*
2 V (eq. 41)
R O
R PH(NEW) + R PH(OLD)
Figure 30. Single ? Point Thermal Monitoring
Multiple ? point hot spot thermal monitoring can be
implemented as shown in Figure 31. If any of the monitored
hot spots reach alarm temperature, the VRTT signal is asserted.
The following calculation sets the alarm temperature:
V
2 V
R TTSET1 + V R TH1ALARMTEMPERATURE
1 FD
REF
Where V FD is the forward drop voltage of the parallel diode.
Because the forward current is very small, the forward drop
voltage is very low (100 mV). Assuming the same 100 ° C
alarm temperature used in the single ? spot thermal monitoring
example, and the same Vishay thermistor, then Equation 41
leads to R TTSET = 7.37 k W , whose closest standard resistor is
7.32 k W (1%).
R OMEAS
(eq. 43)
8. Repeat Steps 6 and 7 to check load line and repeat
adjustments if necessary.
9. Once completed with dc load line adjustment, do not
change R PH , R CS1 , R CS2 , or R TH for the rest of
procedure.
10. Measure output ripple at no load and full load with a
scope to make sure it is within specification.
AC Loadline Setting
VCC
31
5V
V ACDRP
R
R TTSET1
R TTSET2
R TTSET3
V DCDRP
TTSN
?
+
R
30
R TH1
R TH2
R TH3
Figure 31. Multiple ? Point Thermal Monitoring
The number of hot spots monitored is not limited. The
alarm temperature of each hot spot can be set differently by
playing different R TTSET1 , R TTSET2 , and R TTSETn .
Tuning Procedure for ADP3207C
1. Build the circuit based on compensation values
computed from Equations 1 to 41.
2. Hook ? up the dc load to the circuit. Turn the circuit
on and verify operation. Check for jitter at no load
and full load.
Figure 32. AC Loadline Waveform
11. Remove the dc load from the circuit and hook up
the dynamic load.
12. Hook up the scope to the output voltage and set it
to dc coupling with the time scale at 100 m s/div.
13. Set the dynamic load for a transient step of about
40 A at 1 kHz with a 50% duty cycle.
14. Measure the output waveform (using the dc offset
on scope to see the waveform, if necessary). Try to
use the vertical scale of 100 mV/div or finer.
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP3207D | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:7-Bit Programmable, Multi-Phase Mobile, CPU Synchronous Buck |
| ADP3207DJCPZ-RL | 功能描述:DC/DC 开关控制器 IMVP6 BUCK CONTROLLER RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| ADP3207JCPZ-RL | 功能描述:DC/DC 开关控制器 IMVP6 MLTI/PHSE CNTR RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| ADP3208AJCPZ-RL | 功能描述:肖特基二极管与整流器 IMVP6 MLT-PH CTRL W/DRVR RoHS:否 制造商:Skyworks Solutions, Inc. 产品:Schottky Diodes 峰值反向电压:2 V 正向连续电流:50 mA 最大浪涌电流: 配置:Crossover Quad 恢复时间: 正向电压下降:370 mV 最大反向漏泄电流: 最大功率耗散:75 mW 工作温度范围:- 65 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SOT-143 封装:Reel |
| ADP3208C | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:7-Bit,Programmable,Dual- Phase,Mobile,CPU,Synchronous Buck Controller |
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