参数资料
型号: STM32L151V8T6TR
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PQFP100
封装: 14 X 14 MM, 0.50 MM PITCH, ROHS COMPLIANT, LQFP-100
文件页数: 5/106页
文件大小: 1417K
代理商: STM32L151V8T6TR
Package characteristics
STM32L151xx, STM32L152xx
102/106
Doc ID 17659 Rev 1
7.2.2
Selecting the product temperature range
When ordering the microcontroller, the temperature range is specified in the ordering
information scheme shown in Table 63: Ordering information scheme.
Each temperature range suffix corresponds to a specific guaranteed ambient temperature at
maximum dissipation and, to a specific maximum junction temperature.
As applications do not commonly use the STM32L15xxx at maximum dissipation, it is useful
to calculate the exact power consumption and junction temperature to determine which
temperature range will be best suited to the application.
The following examples show how to calculate the temperature range needed for a given
application.
Example 1: High-performance application
Assuming the following application conditions:
Maximum ambient temperature TAmax = 82 °C (measured according to JESD51-2),
IDDmax = 50 mA, VDD = 3.5 V, maximum 20 I/Os used at the same time in output at low
level with IOL = 8 mA, VOL= 0.4 V and maximum 8 I/Os used at the same time in output
at low level with IOL = 20 mA, VOL= 1.3 V
PINTmax = 50 mA × 3.5 V= 175 mW
PIOmax = 20 × 8 mA × 0.4 V + 8 × 20 mA × 1.3 V = 272 mW
This gives: PINTmax = 175 mW and PIOmax = 272 mW:
PDmax = 175 + 272 = 447 mW
Thus: PDmax = 447 mW
Using the values obtained in Table 62 TJmax is calculated as follows:
For LQFP100, 46 °C/W
TJmax = 82 °C + (46 °C/W × 447 mW) = 82 °C + 20.6 °C = 102.6 °C
This is within the range of the suffix 6 version parts (–40 < TJ < 105 °C).
In this case, parts must be ordered at least with the temperature range suffix 6 (see
Example 2: High-temperature application
Using the same rules, it is possible to address applications that run at high ambient
temperatures with a low dissipation, as long as junction temperature TJ remains within the
specified range.
Assuming the following application conditions:
Maximum ambient temperature TAmax = 115 °C (measured according to JESD51-2),
IDDmax = 20 mA, VDD = 3.5 V, maximum 20 I/Os used at the same time in output at low
level with IOL = 8 mA, VOL= 0.4 V
PINTmax = 20 mA × 3.5 V= 70 mW
PIOmax = 20 × 8 mA × 0.4 V = 64 mW
This gives: PINTmax = 70 mW and PIOmax = 64 mW:
PDmax = 70 + 64 = 134 mW
Thus: PDmax = 134 mW
相关PDF资料
PDF描述
STM32L151V8T6D 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PQFP100
STM32L151V8H6D 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PBGA100
STM32L151RBT6 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PQFP64
STM32L151RBH6 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PBGA64
STM32L151RBH6DTR 32-BIT, FLASH, 32 MHz, RISC MICROCONTROLLER, PBGA64
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