L6208PD STMicroelectronics, L6208PD Datasheet - Page 9

• Manufacturer Part Number: L6208PD
• Description: IC DVR STEPPER MOTOR 36POWERSOIC
• Manufacturer: STMicroelectronics
• Type: Driverr

Specifications of L6208PD

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 2
• Current - Output: 5.6A
• Voltage - Supply: 8 V ~ 52 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 36-PowerSOIC
• Operating Supply Voltage: 8 V to 52 V
• Supply Current: 0.01 A
• Mounting Style: SMD/SMT
• For Use With: 497-5488 - EVAL BOARD FOR L6208N DIP497-4136 - EVAL BOARD FOR L6208 SERIES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-1425-5; 497-1425-5; 497-4214-5

Figure 5. Overcurrent Detection Timing Definition
CIRCUIT DESCRIPTION
POWER STAGES and CHARGE PUMP
The L6208 integrates two independent Power MOS Full Bridges. Each Power MOS has an R
ical value @ 25°C), with intrinsic fast freewheeling diode. Switching patterns are generated by the PWM Current
Controller and the Phase Sequence Generator (see below). Cross conduction protection is achieved using a
dead time (t
a bridge.
Pins VS
voltage in the range from 8V to 52V. It has to be noticed that the R
supply voltage is in the range from 8V to 12V (see Fig. 34 and 35).
Using N-Channel Power MOS for the upper transistors in the bridge requires a gate drive voltage above the
power supply voltage. The bootstrapped supply voltage V
external components to realize a charge pump circuit as shown in Figure 6. The oscillator output (VCP) is a
square wave at 600KHz (typical) with 10V amplitude. Recommended values/part numbers for the charge pump
circuit are shown in Table 1.
Table 1. Charge Pump External Components Values
C
C
R
D1
D2
BOOT
P
P
A
and VS
DT
= 1 s typical value) between the switch off and switch on of two Power MOSFETSs in one leg of
B
MUST be connected together to the supply voltage V
220nF
10nF
100
1N4148
1N4148
BRIDGE
I
SOVER
I
V
OUT
OFF
90%
10%
EN
ON
t
OCD(ON)
BOOT
t
OCD(OFF)
is obtained through an internal Oscillator and few
DS(ON)
increases of some percents when the
S
. The device operates with a supply
D02IN1399
DS(ON)
= 0.3 (typ-
L6208
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