- 您现在的位置：买卖IC网 > PDF目录80037 > L6726ATR (STMICROELECTRONICS) 1.5 A SWITCHING CONTROLLER, 297 kHz SWITCHING FREQ-MAX, PDSO8 PDF资料下载
参数资料
| 型号： | L6726ATR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING CONTROLLER, 297 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SOP-8 |
| 文件页数： | 3/35页 |
| 文件大小： | 986K |
| 代理商： | L6726ATR |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页
L6726A
Driver section
Doc ID 12754 Rev 4
11/35
5.1
Power dissipation
L6726A embeds high current MOSFET drivers for both high side and low side MOSFETs: it
is then important to consider the power that the device is going to dissipate in driving them
in order to avoid overcoming the maximum junction operative temperature.
Two main terms contribute in the device power dissipation: bias power and drivers power.
●
Device bias power (PDC) depends on the static consumption of the device through the
supply pins and it is simply quantifiable as follow (assuming to supply HS and LS
drivers with the same VCC of the device):
●
Drivers power is the power needed by the driver to continuously switch on and off the
external MOSFETs; it is a function of the switching frequency, the voltage supply of the
driver and total gate charge of the selected MOSFETs. It can be quantified considering
that the total power PSW dissipated to switch the MOSFETs (easy calculable) is
dissipated by three main factors: external gate resistance (when present), intrinsic
MOSFET resistance and intrinsic driver resistance. This last term is the important one
to be determined to calculate the device power dissipation. The total power dissipated
to switch the MOSFETs results:
where VBOOT - VPHASE is the voltage across the bootstrap capacitor.
External gate resistors helps the device to dissipate the switching power since the same
power PSW will be shared between the internal driver impedance and the external resistor
resulting in a general cooling of the device.
Figure 4.
Soft start (left) and disable (right)
P
DC
V
CC
I
CC
I
BOOT
+
()
=
P
SW
F
SW
Q
gHS
V
BOOT
V
PHASE
–
() Q
gLS
V
CC
+
[]
=
相关PDF资料 |
PDF描述 |
|---|---|
| LH0070-0H/883C | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 10 V, MBCY3 |
| LQD30A48-3V3-1V8RA | 2-OUTPUT 76.5 W DC-DC REG PWR SUPPLY MODULE |
| LSN-1.2/10-D3B | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| LS4301-7ERD7TB1 | 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LM3705XBMM-463/NOPB | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6726-D18-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
| L6726G-D18-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
| L6726G-S18-R | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
| L6726G-S18-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
| L6726L-D18-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
发布紧急采购，3分钟左右您将得到回复。