L298P STMicroelectronics, L298P Datasheet - Page 7

• Manufacturer Part Number: L298P
• Description: IC DRIVER FULL DUAL 20POWERRSOIC
• Manufacturer: STMicroelectronics
• Type: H Bridger

Specifications of L298P

• Input Type: Non-Inverting
• Number Of Outputs: 4
• Current - Output / Channel: 2A
• Current - Peak Output: 3A
• Voltage - Supply: 4.5 V ~ 46 V
• Operating Temperature: -25°C ~ 130°C
• Mounting Type: Surface Mount
• Package / Case: PowerSO-20 Exposed Bottom Pad
• Operating Temperature Classification: Commercial
• Package Type: PowerSO
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 42V
• Operating Supply Voltage (max): 46V
• Operating Supply Voltage: 4.8 V to 46 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• On-state Resistance: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 497-1396-5

Figure 7 : For higher currents, outputs can be paralleled. Take care to parallel channel 1 with channel 4
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 com-
mon 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 (R
tensity of this current.
1.2. INPUT STAGE
Each bridge is driven by means of four gates the in-
put 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.
2. 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 ca-
pacitor 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.
and channel 2 with channel 3.
SA
; R
SB
.) allows to detect the in-
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 Sup-
ply Voltage and before to Turn it OFF, the Enable in-
put must be driven to the Low state.
3. APPLICATIONS
Fig 6 shows a bidirectional DC motor control Sche-
matic Diagram for which only one bridge is needed.
The external bridge of diodes D1 to D4 is made by
four fast recovery elements (trr
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 pro-
vide overcurrent protection by switching low the en-
able 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 configura-
tion can be chosen (See Fig.7).
An external bridge of diodes are required when in-
ductive loads are driven and when the inputs of the
IC are chopped ; Shottky diodes would be preferred.
200 nsec) that
L298
7/13