L6227Q STMicroelectronics, L6227Q Datasheet - Page 15

• Manufacturer Part Number: L6227Q
• Description: IC DRIVER FULL BRDG PWM 32VFQFPN
• Manufacturer: STMicroelectronics
• Type: H Bridger

Specifications of L6227Q

• Input Type: Non-Inverting
• Number Of Outputs: 4
• On-state Resistance: 730 mOhm
• Current - Output / Channel: 1.4A
• Current - Peak Output: 2.8A
• Voltage - Supply: 8 V ~ 52 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN, 32-VFQFPN
• Product: H-Bridge Drivers
• Rise Time: 250 ns
• Fall Time: 250 ns
• Supply Voltage (min): 8 V
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Bridge Type: Full Bridge
• Maximum Turn-on Delay Time: 1900 ns
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 2
• For Use With: 497-6817 - EVAL BOARD FOR L6227Q
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6227Q
4.5
Figure 12. Area where t
Slow decay mode
Figure 13
time, the lower power MOS is switched off and the current recirculates around the upper half
of the bridge. Since the voltage across the coil is low, the current decays slowly. After the
dead time the upper power MOS is operated in the synchronous rectification mode. When
the monostable times out, the lower power MOS is turned on again after some delay set by
the dead time to prevent cross conduction.
Figure 13. Slow decay mode output stage configurations
shows the operation of the bridge in the slow decay mode. At the start of the off
100
10
1
0.1
ON
can vary maintaining the PWM regulation
1.5µs (typ. value)
1
Coff [nF]
10
Circuit description
100
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