STMicroelectronics STIPQ3M60T-H SLLIMM User Manual

UM2682

User manual

300 W motor control power board based on STIPQ3M60T-H SLLIMM™-nano 2nd series MOSFET IPM

Introduction

The STEVAL-IPMNM3Q is a compact motor drive power board equipped with SLLIMM-nano (small low-loss intelligent molded module) 2nd series based on N-channel Power MOSFET MDmesh™ DM2 fast-recovery diode (STIPQ3M60T-HL). It provides an affordable and easy-to-use solution for driving high power motors in a wide range of applications such as power white goods, air conditioning, compressors, power fans and 3-phase inverters for motor drives in general.

The IPM itself consists of six MOSFETs, three high voltage half-bridge gate driver ICs and a wide range of features like undervoltage lockout, smart shutdown, internal temperature sensor and NTC, overcurrent protection and internal op-amp. The main characteristics of this evaluation board are small size, minimal BOM and high efficiency. It features an interface

circuit (BUS and VCC connectors), bootstrap capacitors, snubber capacitor, hardware short-circuit protection, fault event signal and temperature monitoring. It is designed to work in singleor three-shunt configuration and with triple current sensing options: three dedicated on-board op-amps, op-amps embedded on MCU or single internal IPM op-amp. The Hall/Encoder part completes the circuit.

The system is designed to achieve accurate and fast conditioning of current feedback to satisfy the typical requirements for field oriented control (FOC).

The STEVAL-IPMNM3Q is compatible with ST’s control board based on STM32, providing a complete platform for motor control.

Figure 1. Motor control board based on SLIMM-nano 2nd series - top view

Figure 2. Motor control board based on SLIMM-nano 2nd series - bottom view

UM2682 - Rev 2 - November 2020	www.st.com
For further information contact your local STMicroelectronics sales office.

UM2682

Key features

1Key features

•Input voltage: from 125 to 400 VDC

•Nominal power: up to 300 W

–Allowable maximum power is related to the application conditions and cooling system

•Nominal current: up to 1.1 Arms

•Input auxiliary voltage: up to 20 VDC

•Singleor three-shunt resistors for current sensing (with sensing network)

•Three options for current sensing: dedicated external op-amps, internal SLLIMM-nano or via MCU

•Overcurrent hardware protection

•IPM temperature monitoring and protection

•Hall sensor or encoder input

•MOSFETs intelligent power module

–SLLIMM-nano 2nd series IPM STIPQ3M60T-H - Full molded package

•Motor control connector (32 pins) interfacing with ST MCU boards

•Universal design for further evaluation with breadboard and testing pins

•Very compact size

•WEEE compliant

•RoHS compliant

UM2682 - Rev 2	page 2/31

UM2682

Circuit schematics

2Circuit schematics

The full schematics for the SLLIMM-nano card for STIPQ3M60T-H IPM products is shown below. This card consists of an interface circuit (BUS and VCC connectors), bootstrap capacitors, snubber capacitor, short-circuit protection, fault output circuit, temperature monitoring, single-/three-shunt resistors and filters for input signals. It also includes bypass capacitors for VCC and bootstrap capacitors. The capacitors are located very close to the drive IC to avoid malfunction due to noise.

Three current sensing options are provided: three dedicated onboard op-amps, one internal IPM op-amp and the embedded MCU op-amps; selection is performed through three jumpers.

The Hall/Encoder section (powered at 5 V or 3.3 V) completes the circuit.

UM2682 - Rev 2	page 3/31

<![if ! IE]>

<![endif]>2 Rev- UM2682

<![if ! IE]>

<![endif]>4/31 page

2.1Schematic diagrams

Input

DC_bus _volta ge

J 1
					C1
1				+
2					330u/400V
INP UT-dc

STEVAL-IPMNntmp decoder

t

G

M

0

RC1

0 RC2

0

1

0 RC3

0 RC4

m

5

6

0 RC8

0 RC9

p

N

Q

0 RC13

0 RC14

Figure 3. STEVAL-IPMNM3Q board schematic (1 of 5)

+Bus						3.3V
R1			R5
470K					U1D
	3.3V		1k0	<![if ! IE]> <![endif]>4
R2	D1		12	+	14	1.65V
			13	-
470K					TS V994
		+ C3	R6	<![if ! IE]> <![endif]>11		+ C4
	Bus _volta ge	47u/35V	1k0			47u/35V
R3	120R
R4	C2
7k5	10n

	2							3						4
			0 RC5									0 RC6								0 RC7
		7									8								9
			0 RC10									0 RC11								0 RC12

<![if ! IE]>

<![endif]>UM2682

<![if ! IE]>

<![endif]>diagrams Schematic

<![if ! IE]>

<![endif]>UM2682 2 Rev-

<![if ! IE]>

<![endif]>5/31 page

Figure 4. STEVAL-IPMNM3Q board schematic (2 of 5)

E1

<![if ! IE]> <![endif]>3

S W1

2Curre nt_A

Control Conne ctor

<![if ! IE]>

<![endif]>1

Curre nt_A_a mp					J 2
			EM_S TOP	1	2
				3	4
			P WM-A-H
				5	6
			P WM-A-L
				7	8
E2			P WM-B-H
				9	10
			P WM-B-L
				11	12
<![if ! IE]> <![endif]>3	S W2		P WM-C-H
				13	14
			P WM-C-L			Bus _volta ge
				15	16
		Curre nt_B
	2			17	18
				19	20
			NTC_bypa s s _re la y	21	22
<![if ! IE]> <![endif]>1				23	24
			+5V	25	26	NTC
				27	28
						3.3V
Curre nt_B_a mp			P WM_Vre f	29	30
				31	32
			M_pha s e _A
				33	34
			M_pha s e _B			M_pha s e _C
E3

<![if ! IE]> <![endif]>3

S W3

2Curre nt_C

<![if ! IE]>

<![endif]>1

Curre nt_C_a mp

J 3

pha s e _C

3

2 pha s e _B

1

pha s e _A

Motor Output

<![if ! IE]>

<![endif]>UM2682

<![if ! IE]>

<![endif]>diagrams Schematic

<![if ! IE]>

<![endif]>2 Rev- UM2682

<![if ! IE]>

<![endif]>6/31 page

Figure 5. STEVAL-IPMNM3Q board schematic (3 of 5)

<![if ! IE]>

<![endif]>UM2682

<![if ! IE]>

<![endif]>diagrams Schematic

<![if ! IE]>

<![endif]>UM2682 2 Rev-

1.65V

C22

10n

R21 1k0

E1

C24

100p

R23 1k0

1.65V

C28

10n

R30 1k0

E3

C30

100p

R32 1k0

<![if ! IE]>

<![endif]>7/31 page

R20

1k9

	<![if ! IE]> <![endif]>4
3	+
2	-
	<![if ! IE]> <![endif]>11

R24

1k9

R28

1k9

	<![if ! IE]> <![endif]>4
5	+
6	-
	<![if ! IE]> <![endif]>11

R33

1k9

Figure 6. STEVAL-IPMNM3Q board schematic (4 of 5)

3.3V

C21

<![if ! IE]> <![endif]>+
4.7u 50V	C23
U1A	100n
			TP 24
		R22
1			Curre nt_A_a mp
		1k	C25
TS V994			330p		na no OP +
			1.65V				<![if ! IE]> <![endif]>4
				C26		10	+
				10n	R25	9	-
					1k9
							<![if ! IE]> <![endif]>11
			R26	1k0
			E2
				C27
				100p
			R27	1k0
					na no OP -
			3.3V		R29
					1k9
U1B			TP 26
		R31
7			Curre nt_C_a mp
		1k	C31
TS V994			330p

3.3V

U1C

8

TS V994

<![if ! IE]>

<![endif]>1

S W17

2

<![if ! IE]>

<![endif]>3

na no OP OUT

3.3V

D10

TP 25

R43

Curre nt_B_a mp

	1k	C29
		330p

<![if ! IE]>

<![endif]>UM2682

<![if ! IE]>

<![endif]>diagrams Schematic

<![if ! IE]>

<![endif]>2 Rev - UM2682

<![if ! IE]>

<![endif]>8/31 page

Figure 7. STEVAL-IPMNM3Q board schematic (5 of 5)

3.3V

	<![if ! IE]> <![endif]>3	S W9
C32		2	Hall/Encoder
100n
	<![if ! IE]> <![endif]>1		S W10	R34	R35	R36
				4k7	4k7	4k7
+5V			R37	2k4
									M_pha s e _A
			S W11
C33
100n
			R38	2k4
			S W12						M_pha s e _B
	J 5	1
H1/A+	1
		2	R39	2k4
H2/B+	2
		3							M_pha s e _C
H3/Z+	3
		4
+3.3/5V	4
		5
GND	5					S W13	S W14	S W15
			C34
Encode r/Ha ll			100n
				C35	C36	C37
				10p	10p	10p	R40	R41	R42
							4k7	4k7	4k7
3.3V
	<![if ! IE]> <![endif]>3	S W16
		2
	<![if ! IE]> <![endif]>1
+5V

<![if ! IE]>

<![endif]>UM2682

<![if ! IE]>

<![endif]>diagrams Schematic

UM2682

Main characteristics

3Main characteristics

The board is designed for a 125 VDC to 400 VDC supply voltage.

An appropriate bulk capacitor for the power level of the application must be mounted at the dedicated position on the board.

The SLLIMM-nano integrates six MOSFET switches and high voltage gate drivers. Thanks to this integrated module, the system offers power inversion in a simple and compact design that requires less PCB area and increases reliability.

The board offers the added flexibility of being able to operate in singleor three-shunt configuration by modifying solder bridge jumper settings (see Section 4.3.4 Singleor three-shunt selection).

Figure 8. STEVAL-IPMNM3Q architecture

UM2682 - Rev 2	page 9/31

UM2682

Filters and key parameters

4Filters and key parameters

4.1Input signals

The input signals (LINx and HINx) to drive the internal MOSFETs are active high. A 375 kΩ (typ.) pull-down resistor is built-in for each input signal. To prevent input signal oscillation, an RC filter is added on each input as close as possible to the IPM. The filter is designed using a time constant of 10 ns (1 kΩ and 10 pF).

4.2Bootstrap capacitor

	In the 3-phase inverter, the emitters of the low side MOSFETs are connected to the negative DC bus (VDC-)
	as common reference ground, which allows all low side gate drivers to share the same power supply, while the
	emitter of the high side MOSFETs is alternatively connected to the positive (VDC+) and negative (VDC-) DC bus
	during running conditions.
	A bootstrap method is a simple and cheap solution to supply the high voltage section. This function is normally
	accomplished by a high voltage fast recovery diode. The SLLIMM-nano MOSFET-based family includes a
	patented integrated structure that replaces the external diode with a high voltage DMOS functioning as a diode
	with series resistor. An internal charge pump provides the DMOS driving voltage.
	The value of the CBOOT capacitor should be calculated according to the application requirements.
	Figure 9. CBOOT graph selection shows the behavior of CBOOT (calculated) versus switching frequency (fsw),
	with different values of ΔVCBOOT for a continuous sinusoidal modulation and a duty cycle δ = 50%.
Note:	This curve is taken from application note AN5244 (available on www.st.com); calculations are based on the
	STIPN2M50x-Hy device, which represents the worst case scenario for this kind of calculation.
	The boot capacitor must be two or three times larger than the CBOOT calculated in the graph.
	For this design, a value of 2.2 μF was selected.
	Figure 9. CBOOT graph selection

<![if ! IE]>

<![endif]>CBOOT Calculated (µF)

5

STIPN2M50x-Hy

δ=50%

4

3

ΔVCBOOT=0.1V

2	ΔVCBOOT=0.3V

ΔVCBOOT=0.5V

1

0

0

5

10

15

20

fsw (kHz)

GADG221020181007IG

4.3Overcurrent protection

The SLLIMM-nano MOSFET-based integrates a comparator for fault sensing purposes. The comparator has an internal voltage reference VREF (540 mV typ.) connected to the inverting input, while the non-inverting input on the CIN pin can be connected to an external shunt resistor to implement the overcurrent protection function.

When the comparator triggers, the device enters the shutdown state.

The comparator output is connected to the SD pin in order to send the fault message to the MCU.

UM2682 - Rev 2	page 10/31