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3935 Schematic ( PDF Datasheet ) - Allegro MicroSystems

Teilenummer 3935
Beschreibung 3-PHASE POWER MOSFET CONTROLLER
Hersteller Allegro MicroSystems
Logo Allegro MicroSystems Logo 




Gesamt 16 Seiten
3935 Datasheet, Funktion
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3935
3-PHASE POWER MOSFET CONTROLLER
— For Automotive Applications
Package ED, 44-Pin PLCC
Package JP, 48-Pin LQFP
Package LQ, 36-Pin SOIC
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltages, VBAT, VDRAIN,
VBOOST, BOOSTD ... -0.6 V to 40 V
Output Voltage Ranges,
GHA/GHB/GHC, VGHX .. -4 V to 55 V
SA/SB/SC, VSX ............... -4 V to 40 V
GLA/GLB/GLC, VGLX .... -4 V to 16 V
CA/CB/CC, VCX .......... -0.6 V to 55 V
Sense Circuit Voltages,
CSP,CSN, LSS ............... -4 V to 6.5 V
Logic Supply Voltage,
VDD ........................... -0.3 V to +6.5 V
Logic Input/Outputs and OVSET, BOOSTS,
CSOUT, VDSTH ......... -0.3 V to 6.5 V
Operating Temperature Range,
TA ........................... -40°C to +135°C
Junction Temperature, TJ ........... +150°C
Storage Temperature Range,
TS ........................... -55°C to +150°C
* Fault conditions that produce excessive
junction temperature will activate device
thermal shutdown circuitry. These conditions
can be tolerated, but should be avoided.
The A3935 is designed specifically for automotive applications that
require high-power motors. Each provides six high-current gate drive
outputs capable of driving a wide range of n-channel power MOSFETs.
A requirement of automotive systems is steady operation over a
varying battery input range. The A3935 integrates a pulse-frequency
modulated boost converter to create a constant supply voltage for
driving the external MOSFETs. Bootstrap capacitors are utilized to
provide the above battery supply voltage required for n-channel FETs.
Direct control of each gate output is possible via six TTL-compat-
ible inputs. A differential amplifier is integrated to allow accurate
measurement of the current in the three-phase bridge.
Diagnostic outputs can be continuously monitored to protect the
driver from short-to-battery, short-to-supply, bridge-open, and battery
under/overvoltage conditions. Additional protection features include
dead-time, VDD undervoltage, and thermal shutdown.
The A3935 is supplied in a choice of three packages, a 44-lead
PLCC with copper batwing tabs (suffix ED), a 48-lead low profile QFP
with exposed thermal pad (suffix JP), and a 36-lead 0.8 mm pitch SOIC
(suffix LQ).
FEATURES
! Drives wide range of n-channel MOSFETs in 3-phase bridges
! PFM boost converter for use with low-voltage battery supplies
! Internal LDO regulator for gate-driver supply
! Bootstrap circuits for high-side gate drivers
! Current monitor output
! Adjustable battery overvoltage detection.
! Diagnostic outputs
! Motor lead short-to-battery, short-to-ground, and
bridge-open protection
! Undervoltage protection
! -40 °C to +150 °C, TJ operation
! Thermal shutdown
Always order by complete part number, e.g., A3935KLQ .






3935 Datasheet, Funktion
3935
THREE-PHASE POWER
MOSFET CONTROLLER
ELECTRICAL CHARACTERISTICS: unless otherwise noted at TJ = -40°C to +150°C, VBAT = 7 V to 16 V,
VDD = 4.75 V to 5.25 V, ENABLE = 22.5 kHz, 50% Duty Cycle, Two Phases Active.
Characteristics
Sense Amplifier
Input Bias Current
Input Offset Current
Input Resistance
Diff. Input Operating Voltage
Output Offset Voltage
Output Offset Voltage Drift
Input Com-Mode Oper. Range
Voltage Gain
Low Output Voltage Error
DC Common-Mode Attenuation
Output Resistance
Output Dynamic Range
Output Current, Sink
Output Current, Source
VDD Supply Ripple Rejection
VREG Supply Ripple Rejection
Small Signal 3-dB Bandwidth
AC Common-Mode Attenuation
Output Slew Rate
(positive or negative)
Symbol Conditions
Ibias
IIO
ri
VID
VOO
VOO
VIC
AV
Ev
AVC
ro
VCSOUT
Isink
Isource
PSRR
PSRR
f3db
Avc
SR
CSP = CSN = 0 V
CSP = CSN = 0 V
CSP with respect to GND
CSN with respect to GND
VID = CSP – CSN, -1.3V < CSP,N < 4V
CSP = CSN = 0 V
CSP = CSN = 0 V
CSP = CSN
VID = 40 mV to 200 mV
Vid = 0 to 40 mV, Vo = (19.2 x VID) + Vo + Ev
CSP = CSN = 200 mV
VCSOUT = 2.0 V
ICSOUT = -100 µA at top rail, 100 µA at bottom rail
VCSOUT = 2.5 V
VCSOUT = 2.5 V
CSP = CSN = GND, freq. = 0 to 1 MHz
CSP = CSN = GND, freq. = 0 to 300 kHz
10 mV input
Vcm = 250 mV/pp, freq. = 0 to 800 kHz
200 mV step input, meas. 10/90% points
Limits
Min Typ Max
Units
-180 – -360
– – ±35
– 80 –
– 4.0 –
– – ±200
77 250 450
– 100 –
-1.5 – 4.0
18.6 19.2 19.8
– – ±25
28 –
– 8.0 –
0.075
20
– VDD-0.25
––
-1.0 –
20 –
45 –
– 1.6 –
26 –
10 –
µA
µA
k
k
mV
mV
µV/°C
V
V/V
mV
dB
V
mA
mA
dB
dB
MHz
dB
V/µs
NOTES: Typical Data and Typical Characteristics are for design information only.
Negative current is defined as coming out of (sourcing) the specified device terminal.
115 Northeast Cutoff, Box 15036
6 Worcester, Massachusetts 01615-0036 (508) 853-5000

6 Page









3935 pdf, datenblatt
3935
THREE-PHASE POWER
MOSFET CONTROLLER
Package ED, 44-Pin PLCC
Package JP, 48-Pin LQFP
VDRAIN 7
VBOOST 8
BOOSTS 9
BOOSTD 10
GND 11
GND 12
VBAT 13
UVFLT 14
OVFLT 15
FAULT 16
ALO 17
39 CC
38 GHC
37 SC
36 GLC
35 GND
34 GND
33 LSS
32 VDSTH
31 CSP
30 CSN
29 VDD
NC 37
GHA 38
CA 39
VREG 40
VDRAIN 41
VBOOST 42
BOOSTS 43
BOOSTD 44
GND 45
VBAT 46
NC 47
NC 48
24 NC
23 NC
22 GLC
21 LSS
20 VDSTH
19 CSP
18 CSN
17 VDD
16 CSOUT
15 OVSET
14 NC
13 NC
Package LQ, 36-Pin SOIC
CSP 1
VDSTH 2
LSS 3
GLC 4
SC 5
GHC 6
CC 7
GLB 8
SB 9
GHB 10
CB 11
GLA 12
SA 13
GHA 14
CA 15
VREG 16
VDRAIN 17
VBOOST 18
36 CSN
35 VDD
34 CSOUT1
33 OVSET
32 ENABLE
31 CHI
30 CLO
29 BLO
28 BHI
27 AHI
26 ALO
25 FAULT
24 OVFLT
23 UVFLT
22 VBAT
21 GND
20 BOOSTD
19 BOOSTS
115 Northeast Cutoff, Box 15036
12 Worcester, Massachusetts 01615-0036 (508) 853-5000

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