PM8834 STMicroelectronics, PM8834 Datasheet - Page 8

• Manufacturer Part Number: PM8834
• Description: IC MOSFET DVR 4A DUAL SOIC-8
• Manufacturer: STMicroelectronics
• Type: Low Side Mosfet Driverr

Specifications of PM8834

• Configuration: Low-Side
• Input Type: PWM
• Delay Time: 35ns
• Current - Peak: 4A
• Number Of Configurations: 2
• Number Of Outputs: 2
• Voltage - Supply: 5 V ~ 18 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Product: Driver ICs - Various
• Rise Time: 10 ns
• Fall Time: 10 ns
• Propagation Delay Time: 45 ns
• Supply Voltage (max): 18 V
• Supply Voltage (min): 4.5 V
• Supply Current: 3.5 mA
• Maximum Power Dissipation: 1.4 W
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 2
• Output Current: 500 mA
• Output Voltage: 10 V
• Wide Input Supply Voltage Range: 5 V to 18 V
• Wide Operative Temperature Range: -40 °C to 105 °C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• High Side Voltage - Max (bootstrap): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Device description and operation
4.1.2
4.2
8/18
Figure 3.
Enable pins
PM8834 features two independent enable signals, namely ENABLE_1 and ENABLE_2, to
control the operation of each low side driver. Both enable pins are internally pulled up to
VCC with a typ. 100 kΩ resistance and are active high.
In noisy application where ENABLE_1 and ENABLE_2 are not in use, It is strongly
recommended to connect these pins to VCC directly or with a pull-up resistor.
ENABLE_1 and ENABLE_2 are compatible to CMOS/TTL levels and can be directly pulled
up to VCC.
By default, because of the internal pull-up, both drivers are enabled. It is possible to disable
one or both low side drivers connecting the corresponding enable signal to GND.
Output stage
The output stage of the PM8834 make use of ST proprietary lateral DMOS as depicted in
Figure 1.
as well as low ON-resistance: typical peak current is 4 A while output resistances are 1 Ω
and 0.7 Ω for P-DMOS and N-DMOS resistance respectively.
The device features adaptive anti cross-conduction protection. PM8834 continuously
monitors the status of the internal N-DMOS and P-DMOS: in case of a PWM transition,
before switching on the desired DMOS, the device waits until the other DMOS is completely
turned-off. No static current will then flow from VCC to GND.
Both N-DMOS and P-DMOS have been sized to exhibit high driving peak current
Timing diagram
Doc ID 15086 Rev 2
PM8834