r2j20658bnp Renesas Electronics Corporation., r2j20658bnp Datasheet - Page 14

• Manufacturer Part Number: r2j20658bnp
• Description: Integrated Driver - Mos Fet Drmos
• Manufacturer: Renesas Electronics Corporation.

R2J20658BNP
THWN & THDN
This device has two level thermal detection, one is thermal warning and the other is thermal shutdown function.
This Thermal Warning feature is the indication of the high temperature status.
THWN is an open drain logic output signal and need to connect a pull-up resistor (ex.51 k) to THWN for Systems
with the thermal warning implementation.
When the chip temperature of the internal driver IC becomes over 115°C, Thermal warning function operates.
This signal is only indication for the system controller and does not disable DrMOS operation.
When thermal warning function is not used, keep this pin open.
THDN is an internal thermal shutdown signal when driver IC becomes over 150°C.
This function makes High-Side MOS FET and Low-Side MOS FET turn off for the device protection from abnormal
high temperature situation and at the same time DISBL# pin is pulled low internally to give notice to the system
controller. Once thermal shutdown function operates, driver IC keeps DISBL# pin pulled low until VCIN becomes
under UVL level (or under supervisor shutdown level).
Figure 5 shows the example of two types of DISBL# connection with the system controller signal.
< 150°C
> 150°C
MOS FET
The MOS FETs incorporated in R2J20658BNP are highly suitable for synchronous-rectification buck conversion. For
the high-side MOS FET, the drain is connected to the VIN pin and the source is connected to the VSWH pin. For the
low-side MOS FET, the drain is connected to the VSWH pin and the source is connected to the PGND pin.
R07DS0550EJ0101 Rev.1.01
Sep 30, 2011
To shutdown signal
Figure 5.1 THDN Signal to the System Controller
Driver IC Temp.
10 k
5 V
DISBL#
Enable (GL, GH = "Active")
Shutdown (GL, GH = "L")
Driver Chip Status
THWN output
Logic Level
2 μA
Figure 4 THWN Trigger Temperature
"H"
"L"
Shutdown
To Internal
Logic
Detection
Thermal
Normal
operating
Figure 5.2 ON/OFF Signal from the System Controller
100
ON/OFF signal
115
Thermal
warning
10 k
T
IC
DISBL#
(°C)
2 μA
Page 14 of 15
Preliminary
Shutdown
To Internal
Logic
Detection
Thermal