参数资料
型号: MC34708VM
厂商: Freescale Semiconductor
文件页数: 17/159页
文件大小: 0K
描述: IC POWER MANAGEMENT 206MAPBGA
标准包装: 160
应用: 通用
电源电压: 1.8 V ~ 4.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 206-LFBGA
供应商设备封装: 206-MAPBGA(13x13)
包装: 托盘
General Product Characteristics
5.2.1
Power Dissipation
During operation, the temperature of the die should not exceed the maximum junction temperature. To optimize the thermal
management scheme and avoid overheating, the MC34708 PMIC provides a thermal management system. The thermal
protection is based on a circuit with a voltage output proportional to the absolute temperature.This voltage can be read out via
the ADC for specific temperature readouts, see Channel 3 Die Temperature .
The ADEN SPI bit must be set = 1 to enable the comparators for the thermal monitoring (THERM110, THERM120, THERM125,
THERM130, and thermal shutdown). With ADEN = 0 the thermal monitors and thermal shutdown are disabled. Interrupts
THERM110, THERM120, THERM125, and THERM130 will be generated when respectively crossing in either direction the
thresholds specified in Table 6 . The temperature range can be determined by reading the THERMxxxS bits.
Thermal protection is integrated to power off the MC34708 PMIC in case of over dissipation. This thermal protection will act above
the maximum junction temperature to avoid any unwanted power downs. The protection is debounced for 8.0 ms in order to
suppress any (thermal) noise. This protection should be considered as a fail-safe mechanism and therefore the application
design should be dimensioned such that this protection is not tripped under normal conditions. The temperature thresholds and
the sense bit assignment are listed in Table 6
.
Table 6. Thermal Protection Thresholds
Parameter
Thermal 110 °C threshold (THERM110)
Thermal 120 °C threshold (THERM120)
Thermal 125 °C threshold (THERM125)
Thermal 130 °C threshold (THERM130)
Thermal warning hysteresis
Thermal protection threshold
Min
105
115
120
125
2.0
130
Typ
110
120
125
130
-
140
Max
115
125
130
135
4.0
150
Units
°C
°C
°C
°C
°C
°C
Notes
Notes
14. Equivalent to approx. 30 mW min, 60 mW max
The THERM1xx thresholds are debounced by the SPI bits DIE_TEMP_DB[1:0], which are programmable from 100 ? s to 4.0 ms
(4.0 ms by default), see Table 7 . When the die temperature crosses these thresholds, the corresponding sense bit will change,
and an interrupt will be generated to notify the software the hardware is reaching its thermal limit.
Table 7. Die Temp Debounce Settings
DIE_TEMP_DB [1:0]
00
01
10
11 (default)
Time
0.100
1.0
2.5
4.0
Units
ms
ms
ms
ms
MC34708
Analog Integrated Circuit Device Data ?
17
Freescale Semiconductor
相关PDF资料
PDF描述
MC34710EWR2 IC PWR SUPPLY ADJ DUAL SW 32SOIC
MC34712EPR2 IC CONVERTER DDR 24QFN
MC34713EPR2 IC CONVERTER DDR 24QFN
MC34716EPR2 IC CONVERTER DDR 26QFN
MC34717EPR2 IC CONVERTER DDR 26QFN
相关代理商/技术参数
参数描述
MC34708VMR2 功能描述:PMIC 解决方案 PMIC 5S 6LDO BST 10BTADC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel
MC34709 制造商:SPC Multicomp 功能描述:HEADER R/ANGLE 12WAY 制造商:SPC Multicomp 功能描述:HEADER, R/ANGLE, 12WAY 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONN, RECEPTACLE, 12POS, 3MM; Series:2261(5561); Pitch Spacing:3mm; Contact Termination:Through Hole Right Angle; No. of Contacts:12; No. of Rows:2; Connector Mounting:PCB; Gender:Receptacle; Contact Material:Copper Alloy ;RoHS Compliant: Yes
MC34709VK 功能描述:PMIC 解决方案 PMIC 5SW, 6 LDO BST, 10 Bit ADC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel
MC34709VKR2 功能描述:PMIC 解决方案 PMIC 5SW, 6 LDO BST, 10 Bit ADC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel
MC3470N 制造商:Texas Instruments 功能描述: