Multiwatt15 PowerSO20

ORDERING NUMBERS : L298N (Multiwatt Vert.) L298HN (Multiwatt Horiz.) L298P (PowerSO20)

 

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter	Value	Unit
VS	Power Supply	50	V
VSS	Logic Supply Voltage	7	V
VI,Ven	Input and Enable Voltage	–0.3 to 7	V
IO	Peak Output Current (each Channel) – Non Repetitive (t = 100µs) –Repetitive (80% on –20% off; ton = 10ms) –DC Operation	3 2.5 2	A A A
Vsens	Sensing Voltage	–1 to 2.3	V
Ptot	Total Power Dissipation (Tcase = 75°C)	25	W
Top	Junction Operating Temperature	–25 to 130	°C
Tstg, Tj	Storage and Junction Temperature	–40 to 150	°C

PIN CONNECTIONS (top view)

THERMAL DATA

Symbol	Parameter		PowerSO20	Multiwatt15	Unit
Rth j-case	Thermal Resistance Junction-case	Max.	–	3	°C/W
Rth j-amb	Thermal Resistance Junction-ambient	Max.	13 (*)	35	°C/W

(*) Mounted on aluminum substrate

PIN FUNCTIONS (refer to the block diagram)

MW.15	PowerSO	Name	Function
1;15	2;19	Sense A; Sense B	Between this pin and ground is connected the sense resistor to control the current of the load.
2;3	4;5	Out 1; Out 2	Outputs of the Bridge A; the current that flows through the load connected between these two pins is monitored at pin 1.
4	6	VS	Supply Voltage for the Power Output Stages. A non-inductive 100nF capacitor must be connected between this pin and ground.
5;7	7;9	Input 1; Input 2	TTL Compatible Inputs of the Bridge A.
6;11	8;14	Enable A; Enable B	TTL Compatible Enable Input: the L state disables the bridge A (enable A) and/or the bridge B (enable B).
8	1,10,11,20	GND	Ground.
9	12	VSS	Supply Voltage for the Logic Blocks. A100nF capacitor must be connected between this pin and ground.
10; 12	13;15	Input 3; Input 4	TTL Compatible Inputs of the Bridge B.
13; 14	16;17	Out 3; Out 4	Outputs of the Bridge B. The current that flows through the load connected between these two pins is monitored at pin 15.
–	3;18	N.C.	Not Connected

ELECTRICAL CHARACTERISTICS (VS = 42V; VSS = 5V, Tj = 25°C; unless otherwise specified)

Symbol	Parameter	Test Conditions	Min.	Typ.	Max.	Unit
VS	Supply Voltage (pin 4)	Operative Condition	VIH +2.5		46	V
VSS	Logic Supply Voltage (pin 9)		4.5	5	7	V
IS	Quiescent Supply Current (pin 4)	Ven = H; IL = 0 Vi = L		13	22	mA
		Vi = H		50	70	mA
		Ven = L Vi = X			4	mA
ISS	Quiescent Current from VSS (pin 9)	Ven = H; IL = 0 Vi = L		24	36	mA
		Vi = H		7	12	mA
		Ven = L Vi = X			6	mA
ViL	Input Low Voltage (pins 5, 7, 10, 12)		–0.3		1.5	V
ViH	Input High Voltage (pins 5, 7, 10, 12)		2.3		VSS	V
IiL	Low Voltage Input Current (pins 5, 7, 10, 12)	Vi = L			–10	µA
IiH	High Voltage Input Current (pins 5, 7, 10, 12)	Vi = H ≤ VSS –0.6V		30	100	µA
Ven = L	Enable Low Voltage (pins 6, 11)		–0.3		1.5	V
Ven = H	Enable High Voltage (pins 6, 11)		2.3		VSS	V
Ien = L	Low Voltage Enable Current (pins 6, 11)	Ven = L			–10	µA
Ien = H	High Voltage Enable Current (pins 6, 11)	Ven = H ≤ VSS –0.6V		30	100	µA
VCEsat (H)	Source Saturation Voltage	IL = 1A	0.95	1.35	1.7	V
		IL = 2A		2	2.7	V
VCEsat (L)	Sink Saturation Voltage	IL = 1A (5)	0.85	1.2	1.6	V
		IL = 2A (5)		1.7	2.3	V
VCEsat	Total Drop	IL = 1A (5)	1.80		3.2	V
		IL = 2A (5)			4.9	V
Vsens	Sensing Voltage (pins 1, 15)		–1 (1)		2	V

ELECTRICAL CHARACTERISTICS (continued)

Symbol	Parameter	Test Conditions	Min.	Typ.	Max.	Unit
T1 (Vi)	Source Current Turn-off Delay	0.5 Vi to 0.9 IL (2); (4)		1.5		µs
T2 (Vi)	Source Current Fall Time	0.9 IL to 0.1 IL (2); (4)		0.2		µs
T3 (Vi)	Source Current Turn-on Delay	0.5 Vi to 0.1 IL (2); (4)		2		µs
T4 (Vi)	Source Current Rise Time	0.1 IL to 0.9 IL (2); (4)		0.7		µs
T5 (Vi)	Sink Current Turn-off Delay	0.5 Vi to 0.9 IL (3); (4)		0.7		µs
T6 (Vi)	Sink Current Fall Time	0.9 IL to 0.1 IL (3); (4)		0.25		µs
T7 (Vi)	Sink Current Turn-on Delay	0.5 Vi to 0.9 IL (3); (4)		1.6		µs
T8 (Vi)	Sink Current Rise Time	0.1 IL to 0.9 IL (3); (4)		0.2		µs
fc (Vi)	Commutation Frequency	IL = 2A		25	40	KHz
T1 (Ven)	Source Current Turn-off Delay	0.5 Ven to 0.9 IL (2); (4)		3		µs
T2 (Ven)	Source Current Fall Time	0.9 IL to 0.1 IL (2); (4)		1		µs
T3 (Ven)	Source Current Turn-on Delay	0.5 Ven to 0.1 IL (2); (4)		0.3		µs
T4 (Ven)	Source Current Rise Time	0.1 IL to 0.9 IL (2); (4)		0.4		µs
T5 (Ven)	Sink Current Turn-off Delay	0.5 Ven to 0.9 IL (3); (4)		2.2		µs
T6 (Ven)	Sink Current Fall Time	0.9 IL to 0.1 IL (3); (4)		0.35		µs
T7 (Ven)	Sink Current Turn-on Delay	0.5 Ven to 0.9 IL (3); (4)		0.25		µs
T8 (Ven)	Sink Current Rise Time	0.1 IL to 0.9 IL (3); (4)		0.1		µs

1) 1)Sensing voltage can be –1 V for t ≤ 50 µsec; in steady state Vsens min ≥ – 0.5 V.
2) See fig. 2.
3) See fig. 4.
4) The load must be a pure resistor.

Figure 1 : Typical Saturation Voltage vs. OutputFigure 2 : Switching Times Test Circuits. Current.

Note : For INPUT Switching, set EN = H For ENABLE Switching, set IN = H

Figure 3 : Source Current Delay Times vs. Input or Enable Switching.

Figure 4 : Switching Times Test Circuits.

Note : For INPUT Switching, set EN = H For ENABLE Switching, set IN = L

Figure 5 : Sink Current Delay Times vs. Input 0 V Enable Switching.

Figure 6 : Bidirectional DC Motor Control.

Inputs		Function
Ven = H	C = H ; D = L	Forward
	C = L ; D = H	Reverse
	C = D	Fast Motor Stop
Ven = L	C = X ; D = X	Free Running Motor Stop

L = Low H = High X = Don’t care

Figure 7 : For higher currents, outputs can be paralleled. Take care to parallel channel 1 with channel 4 and channel 2 with channel 3.

APPLICATION INFORMATION (Refer to the block diagram)

1.1. POWER OUTPUT STAGE The L298 integrates two power output stages(A; B). The power output stage is a bridge configuration and its outputs can drive an inductive load in common or differenzial mode, depending on the state of the inputs. The current that flows through the load comes out from the bridge at the sense output : an

external resistor (RSA ; RSB.) allows to detect the intensity of this current.

1. INPUT STAGE
2. Each bridge is driven by means of four gates the input of which are In1 ; In2 ; EnA and In3 ; In4 ; EnB. The In inputs set the bridge state when The En input is high ; a low state of the En input inhibits the bridge. All the inputs are TTL compatible.
1. SUGGESTIONS

A non inductive capacitor, usually of 100 nF, must be foreseen between both Vs and Vss, to ground, as near as possible to GND pin. When the large capacitor of the power supply is too far from the IC, a second smaller one must be foreseen near the L298.

The sense resistor, not of a wire wound type, must be grounded near the negative pole of Vs that must be near the GND pin of the I.C.

Each input must be connected to the source of the driving signals by means of a very short path.

Turn-On and Turn-Off : Before to Turn-ON the Supply Voltage and before to Turn it OFF, the Enable input must be driven to the Low state.

3. APPLICATIONS Fig 6 shows a bidirectional DC motor control Schematic Diagram for which only one bridge is needed. The external bridge of diodes D1 to D4 is made by four fast recovery elements (trr ≤ 200 nsec) that

must be chosen of a VF as low as possible at the worst case of the load current. The sense output voltage can be used to control the

current amplitude by chopping the inputs, or to provide overcurrent protection by switching low the enable input.

The brake function (Fast motor stop) requires that the Absolute Maximum Rating of 2 Amps must never be overcome.

When the repetitive peak current needed from the load is higher than 2 Amps, a paralleled configuration can be chosen (See Fig.7).

An external bridge of diodes are required when inductive loads are driven and when the inputs of the IC are chopped ; Shottky diodes would be preferred.

This solution can drive until 3 Amps In DC operation	Fig 10 shows a second two phase bipolar stepper
and until 3.5 Amps of a repetitive peak current.	motor control circuit where the current is controlled
On Fig 8 it is shown the driving of a two phase bipolar	by the I.C. L6506.
stepper motor ; the needed signals to drive the in
puts of the L298 are generated, in this example,
from the IC L297.
Fig 9 shows an example of P.C.B. designed for the
application of Fig 8.
Figure 8 : Two Phase Bipolar Stepper Motor Circuit.

This circuit drives bipolar stepper motors with winding currents up to 2 A. The diodes are fast 2 A types.

RS1 = RS2 = 0.5 Ω

VF ≤ 1.2 V @ I = 2 A D1 to D8 = 2 A Fast diodes { _{trr ≤ 200 ns}

Figure 9 : Suggested Printed Circuit Board Layout for the Circuit of fig. 8 (1:1 scale).

RR and Rsense depend from the load current

DIM.		mm			inch
	MIN.	TYP.	MAX.	MIN.	TYP.	MAX.
A			5			0.197
B			2.65			0.104
C			1.6			0.063
D		1			0.039
E	0.49		0.55	0.019		0.022
F	0.66		0.75	0.026		0.030
G	1.02	1.27	1.52	0.040	0.050	0.060
G1	17.53	17.78	18.03	0.690	0.700	0.710
H1	19.6			0.772
H2			20.2			0.795
L	21.9	22.2	22.5	0.862	0.874	0.886
L1	21.7	22.1	22.5	0.854	0.870	0.886
L2	17.65		18.1	0.695		0.713
L3	17.25	17.5	17.75	0.679	0.689	0.699
L4	10.3	10.7	10.9	0.406	0.421	0.429
L7	2.65		2.9	0.104		0.114
M	4.25	4.55	4.85	0.167	0.179	0.191
M1	4.63	5.08	5.53	0.182	0.200	0.218
S	1.9		2.6	0.075		0.102
S1	1.9		2.6	0.075		0.102
Dia1	3.65		3.85	0.144		0.152

OUTLINE AND
MECHANICAL DATA

Multiwatt15 V

DIM.		mm			inch
	MIN.	TYP.	MAX.	MIN.	TYP.	MAX.
A			5			0.197
B			2.65			0.104
C			1.6			0.063
E	0.49		0.55	0.019		0.022
F	0.66		0.75	0.026		0.030
G	1.14	1.27	1.4	0.045	0.050	0.055
G1	17.57	17.78	17.91	0.692	0.700	0.705
H1	19.6			0.772
H2			20.2			0.795
L		20.57			0.810
L1		18.03			0.710
L2		2.54			0.100
L3	17.25	17.5	17.75	0.679	0.689	0.699
L4	10.3	10.7	10.9	0.406	0.421	0.429
L5		5.28			0.208
L6		2.38			0.094
L7	2.65		2.9	0.104		0.114
S	1.9		2.6	0.075		0.102
S1	1.9		2.6	0.075		0.102
Dia1	3.65		3.85	0.144		0.152