EVAL6229PD STMicroelectronics, EVAL6229PD Datasheet - Page 22

• Manufacturer Part Number: EVAL6229PD
• Description: EVAL BOARD FOR L6229PD SOIC
• Manufacturer: STMicroelectronics

Specifications of EVAL6229PD

• Mfg Application Notes: L6235, AN1625 App Note
• Main Purpose: Power Management, Motor Control
• Embedded: No
• Utilized Ic / Part: L6229PD SOIC
• Primary Attributes: 3-Ph BLDC, 8 ~ 52V Output, PWM Current Control, Brake Function
• Secondary Attributes: Over Current, Cross Conduction & Temperature Protection
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5491

AN1451 APPLICATION NOTE
2.13.1 Maximum output current vs. selectable devices
Figure 22 reports a performance comparison between L6228 (std. power) and L6208 (high power) for different
packages, with the following assumptions:
- Normal Drive Mode (two-phase on)
- Supply voltage: 24 V; Switching frequency: 30 kHz.
- T
- Maximum R
- Maximum quiescent current I
- PCB is a FR4 with a dissipating copper surface on the top side of 6 cm
SO and PowerDIP packages (D, N suffixes).
- PCB is a FR4 with a dissipating copper surface on the top side of 6 cm
via holes and a ground layer for the PowerSO package (PD suffix).
- For each device (on the x axis) y axis reports the maximum output current.
Figure 22. Maximum output current vs. selectable devices.
2.13.2 Power Dissipation Formulae for different sequences
Figure 23 to Figure 26 are screenshots of a spreadsheet that helps calculating power dissipation in specified
conditions (application and motor data), and estimates the resulting junction temperature for a given package
and copper area available on the PCB [6]. The model considers power dissipation during the on-time and the
off-time, taking into account the selected decay, rise and fall time (when a phase change occurs) considering
the operating sequence, the switching losses and the quiescent current power dissipation.
22/43
Load Current
amb
[A]
= 25 °C, T
DS(ON)
1 .7 0
1 .5 0
1 .3 0
1 .1 0
0 .9 0
0 .7 0
0 .5 0
J
= 125 °C.
(taking into account process spread) has been considered, @ 125 °C.
Q
(taking into account process spread) has been considered.
2
2
(with a thickness of 35 µm), 16
(with a thickness of 35 µm) for