TD340ID STMicroelectronics, TD340ID Datasheet - Page 14

• Manufacturer Part Number: TD340ID
• Description: MOSFET & Power Driver ICs H-Bridge Quad MOSFET
• Manufacturer: STMicroelectronics
• Type: High Side/Low Sider

Specifications of TD340ID

• Supply Voltage (min): 6.5 V
• Supply Current: 7 mA
• Maximum Power Dissipation: 500 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SO-20
• Bridge Type: H Bridge
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 4
• Number Of Outputs: 4
• Output Current: 1.5 A
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

TD340
Standby mode
The TD340 can be put in standby mode under software control. When the STBY pin is driven low, the
MOS drivers are switched off and internal charge pump oscillator is stopped. The 5V regulator, the
watchdog and reset circuits are still active.
There is no pull up/down resistor on the STBY pin. STBY must not be left open.
Power consumption (not including the current drained from the 5V regulator) is reduced to about 200uA.
To achieve this standby current, the 5.6k resistor on the OSC pin has to be disconnected with an external
low power MOS controlled by the STBY signal (see figure 10 for an application example)
Standby mode should be only activated when IN1=IN2=0V and after that the motor is actually stopped
because the four MOS are switched off. On exit from the standby mode, a delay of up to 20ms (depending
upon the bootstrap capacitor value) must be given before applying signals to the IN1 and IN2 inputs to
allow proper startup of the charge pump (it is also true for power-up). Figure 8 shows the voltage across
the Cb bootstrap capacitor at powerup or at standby exit as a function of time.
Figure 8 : Charge pump voltage at startup
Fig. 8a : Cb = 10nF
Fig. 8b : Cb = 47nF
Fig. 8c : Cb = 100nF
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