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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： | 11/35页 |
| 文件大小： | 986K |
| 代理商： | L6726ATR |
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L6726A
Application details
Doc ID 12754 Rev 4
19/35
Connect output bulk capacitors (COUT) as near as possible to the load, minimizing parasitic
inductance and resistance associated to the copper trace, also adding extra decoupling
capacitors along the way to the load when this results in being far from the bulk capacitors
bank.
Gate traces and phase trace must be sized according to the driver RMS current delivered to
the power MOSFET. The device robustness allows managing applications with the power
section far from the controller without losing performances. Anyway, when possible, it is
recommended to minimize the distance between controller and power section. See
Figure 11 for drivers current paths.
Small signal components and connections to critical nodes of the application, as well as
bypass capacitors for the device supply, are also important. Locate bypass capacitor (VCC
and Bootstrap capacitor) and loop compensation components as close to the device as
practical. For over current programmability, place ROCSET close to the device and avoid
leakage current paths on LGATE / OC pin, since the internal current source is only 10
μA
Systems that do not use Schottky diode in parallel to the Low-Side MOSFET might show big
negative spikes on the PHASE pin. This spike must be limited within the absolute maximum
ratings (for example, adding a gate resistor in series to HS MOSFET gate, or a phase
resistor in series to PHASE pin), as well as the positive spike, but has an additional
consequence: it causes the bootstrap capacitor to be over-charged. This extra-charge can
cause, in the worst case condition of maximum input voltage and during particular
transients, that boot-to-phase voltage overcomes the absolute maximum ratings also
causing device failures. It is then suggested in this case to limit this extra-charge by adding a
Figure 11.
Drivers turn-on and turn-off paths
RGATE
RINT
CGD
CGS
CDS
VCC
LS DRIVER
LS MOSFET
GND
LGATE
RGATE
RINT
CGD
CGS
CDS
BOOT
HS DRIVER
HS MOSFET
PHASE
UGATE
RPHASE
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相关代理商/技术参数 |
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| L6726-D18-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
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| L6726G-S18-R | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
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| L6726L-D18-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
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