MC33888FB Freescale Semiconductor, MC33888FB Datasheet - Page 29

• Manufacturer Part Number: MC33888FB
• Description: IC SWITCH QUAD H-SIDE W/CS 64QFP
• Manufacturer: Freescale Semiconductor
• Type: High Side/Low Side Driverr

Specifications of MC33888FB

• Input Type: SPI
• Number Of Outputs: 12 ( 4 High Side, 8 Low Side)
• On-state Resistance: 40 mOhm
• Current - Output / Channel: 10A
• Current - Peak Output: 60A
• Voltage - Supply: 6 V ~ 27 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Tests of a few lamps indicated that failures can occur when
18V is applied for a few seconds. Consequently, PWM
switching allows to reduce the effective RMS voltage in order
to drive bulbs safety. The “Vbatt PWM” threshold determines
the transition between the fully-on and PWMing modes.
with a 13V battery at 100% duty cycle, the duty cycle would
be adjusted to (13/18)², or 52%, when the battery is at 18V.
normal operating condition as junction temperature from -40
to 150 °C. In case of permanent current limitation conditions,
Table 11. Results of Fast Transient Pulses on VPWR
Analog Integrated Circuit Device Data
Freescale Semiconductor
(Load dump) 50 pulses
(Load dump) 50 pulses
Automotive lamps do not tolerate high voltages very well.
For example, to maintain the power dissipation associated
The loads must be chosen in order to guarantee the device
Pulse 3a Ri = 50Ω
Pulse 3b Ri = 50Ω
Pulses on VPWR
5000 occurrences
5000 occurrences
Pulse 1 Ri = 10Ω
Pulse 2a Ri = 2Ω
Pulse 5a Ri = 2Ω
Pulse 5b Ri = 2Ω
Duration: 1 hour
Duration 1 hour
HS1 & 3 ON state
Figure 13. Figure 13 – MC33888 power dissipation calculator
PASS: +100V
PASS: -100V
PASS: -150V
PASS: +50V
PASS: +42V
PASS: +42V
loaded
HS1 & 3 ON state
PASS: +42V ,
PASS: +100V
PASS : -40V,
PASS: -150V
PASS: +42V
PASS: +42V
FAIL : -50V
FAIL: +50V
open load
the duration and number of activation cycles must be limited
with a dedicated MCU fault management using the fault
reporting through SPI.
SHAFFNER TESTS
negative transients on VPWR and the output lines (HS[0:3]
and LS[4:11]) per ISO 7637-2 standard.
decoupling capacitors and for HS1 resistive load=2.5Ω and
HS3 resistive load=3Ω.
The MC33888 device is protected in case of positive and
The following characterization has been done without
HS1 & 3 OFF state
PASS: +100V
PASS: -100V
PASS: -150V
PASS: +50V
PASS: +42V
PASS: +42V
loaded
TYPICAL APPLICATIONS
HS1 & 3 OFF state
PASS: +100V
PASS : -40V,
PASS: -150V
PASS: +50V
PASS: +42V
PASS: +42V
open load
FAIL: -50V
33888
29