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Features
* Six High-side and Six Low-side Drivers * Outputs Freely Configurable as Switch, Half Bridge or H-bridge * Capable to Switch All Kinds of Loads Such as DC Motors, Bulbs, Resistors, Capacitors
and Inductors 0.6 A Continuous Current Per Switch Low-side: RDSon < 1.5 Versus Total Temperature Range High-side: RDSon < 2.0 Versus Total Temperature Range Very Low Quiescent Current IS < 20 A in Standby Mode Outputs Short-circuit Protected Overtemperature Prewarning and Protection Under- and Overvoltage Protection Various Diagnosis Functions Such as Shorted Output, Open Load, Overtemperature and Power Supply Fail * Serial Data Interface * Daisy Chaining Possible * SO28 Power Package
* * * * * * * *
Dual Hex DMOS Output Driver with Serial Input Control U6815BM
Description
The U6815BM is a fully protected driver interface designed in 0.8-m BCDMOS technology. It is used to control up to 12 different loads by a microcontroller in automotive and industrial applications. Each of the 6 high-side and 6 low-side drivers is capable to drive currents up to 600 mA. The drivers are freely configurable and can be controlled separately from a standard serial data interface. Therefore, all kinds of loads such as bulbs, resistors, capacitors and inductors can be combined. The IC design especially supports the applications of H-bridges to drive DC motors. Protection is guaranteed in terms of short-circuit conditions, overtemperature, underand overvoltage. Various diagnostic functions and a very low quiescent current in standby mode enable a wide range of applications. Automotive qualification referring to conducted interferences, EMC protection and 2-kV ESD protection gives added value and enhanced quality for the strict automotive requirements.
Rev. 4545B-BCD-12/02
1
Figure 1. Block Diagram
HS1
15 15
HS2
13 13
HS3
12
HS4 33
HS5 22
HS6
28 28
Fault Detect
Fault Detect
Fault Detect
Fault Detect
Fault Detect
Fault Detect
5
VS VS
10 26
DI
VS
Osc
OV 25
6
GND
CLK
S I
24
S C T
O L D
H S 6
L S 6
H S 5
L S 5
H S 4
L S 4
H S 3
L S 3
H S 2
L S 2
H S 1
L S 1
S R R
protection
7
GND
VS
CS
Input Register Output Register
P S F I N H S C D H S 6 L S 6 H S 5 L S 5 H S 4 L S 4 H S 3 L S 3 H S 2 L S 2 H S 1 L S 1 T P
Control
logic
8
UV -
GND
protection
9
GND
INH
17
Thermal
protection
P - ON 20 GND
18 DO
Reset
21
GND
Vcc
22 GND
Fault Detect
Fault Detect
Fault Detect
Fault Detect
Fault Detect
Fault Detect
23
GND
Vcc
19
Vcc
16
14
11
4 LS4 LS5
1
27
LS1
LS2
LS3
LS6
Pin Configuration
Figure 2. Pinning SO28
HS6 28 LS6 27 DI 26 CLK 25 CS 24 GND GND GND GND VCC 23 22 21 20 19 DO 18 INH 17 LS1 16 HS1 15
U6815BM
Lead frame 1 LS5 2 HS5 3 4 5 VS 6 7 8 9 10 VS 11 LS3 12 HS3 13 HS2 14 LS2
HS4 LS4
GND GND GND GND
2
U6815BM
4545B-BCD-12/02
U6815BM
Pin Description
Pin
1 2 3 4 5 6, 7, 8, 9 10 11 12 13 14 15 16 17 18
Symbol
LS5 HS5 HS4 LS4 VS GND VS LS3 HS3 HS2 LS2 HS1 LS1 INH DO
Function
Low-side driver output 5, power-MOS open drain with internal reverse diode, overvoltage protection by active zenering, short-circuit protection, diagnosis for short and open load High-side driver output 5, power-MOS open drain with internal reverse diode, overvoltage protection by active zenering, short-circuit protection, diagnosis for short and open load High-side driver output 4 (see Pin 2) Low-side driver output 4 (see Pin 1) Power supply output stages HS4, HS5, HS6, internal supply; external connection to Pin 10 necessary Ground, reference potential, internal connection to Pin 20 - 23, cooling tab Power supply output stages HS1, HS2 and HS3 Low-side driver output 3 (see Pin 1) High-side driver output 3 (see Pin 2) High-side driver output 2 (see Pin 2) Low-side driver output 2 (see Pin 1) High-side driver output 1 (see Pin 2) Low-side driver output 1 (see Pin 1) Inhibit input, 5-V logic input with internal pull down, low = standby, high = normal operating Serial data output, 5-V CMOS logic level tristate output for output (status) register data, sends 16-bit status information to the microcontroller (LSB is transferred first). Output will remain tristated unless device is selected by CS = low, therefore, several ICs can operate on one data output line only. Logic supply voltage (5 V) Ground (see Pins 6 - 9) Chip select input, 5-V CMOS logic level input with internal pull up, low = serial communication is enabled, high = disabled Serial clock input, 5-V CMOS logic level input with internal pull down, controls serial data input interface and internal shift register (fmax = 2 MHz) Serial data input, 5-V CMOS logic level input with internal pull down, receives serial data from the control device, DI expects a 16-bit control word with LSB being transferred first Low-side driver output 6 (see Pin 1) High-side driver output 6 (see Pin 2)
19 20, 21, 22, 23 24 25 26 27 28
VCC GND CS CLK DI LS6 HS6
3
4545B-BCD-12/02
Functional Description
Serial Interface
Data transfer starts with the falling edge of the CS signal. Data must appear at DI synchronized to CLK and are accepted on the falling edge of the CLK signal. LSB (bit 0, SRR) has to be transferred first. Execution of new input data is enabled on the rising edge of the CS signal. When CS is high, Pin DO is in tristate condition. This output is enabled on the falling edge of CS. Output data will change their state with the rising edge of CLK and stay stable until the next rising edge of CLK appears. LSB (bit 0, TP) is transferred first.
Figure 3. Data Transfer
CS
DI
SRR 0 1
LS1
HS1 2 3
LS2
HS2 4 5
LS3
HS3 6 7
LS4
HS4 8 9
LS5
HS5 10
LS6 11
HS6 12
OLD 13
SCT 14
SI 15
CLK
DO
TP
SLS1
SHS1
SLS2
SHS2
SLS3
SHS3
SLS4
SHS4
SLS5
SHS5
SLS6
SHS6
SCD
INH
PSF
Input Data Protocol
Bit
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Input Register
SRR LS1 HS1 LS2 HS2 LS3 HS3 LS4 HS4 LS5 HS5 LS6 HS6 OLD SCT SI
Function
Status register reset (high = reset; the bits PSF, SCD and overtemperature shutdown in the output data register are set to low) Controls output LS1 (high = switch output LS1 on) Controls output HS1 (high = switch output HS1 on) See LS1 See HS1 See LS1 See HS1 See LS1 See HS1 See LS1 See HS1 See LS1 See HS1 Open load detection (low = on) Programmable time delay for short circuit and overvoltage shutdown (short circuit shutdown delay high/low = 100 ms/12.5 ms, overvoltage shutdown delay high/low = 15 ms/3.5 ms Software inhibit; low = standby, high = normal operation (data transfer is not affected by standby function because the digital part is still powered)
4
U6815BM
4545B-BCD-12/02
U6815BM
After power-on reset, the input register has the following status:
Bit 15 (SI) H Bit 14 (SCT) H Bit 13 (OLD) H Bit 12 (HS6) L Bit 11 (LS6) L Bit 10 (HS5) L Bit 9 (LS5) L Bit 8 (HS4) L Bit 7 (LS4) L Bit 6 (HS3) L Bit 5 (LS3) L Bit 4 (HS2) L Bit 3 (LS2) L Bit 2 (HS1) L Bit 1 (LS1) L Bit 0 (SRR) L
Output Data Protocol
Bit
0 1
Output (Status) Register
TP Status LS1
Function
Temperature prewarning: high = warning (overtemperature shut down) (1) Normal operation: high = output is on, low = output is off Open-load detection: high = open load, low = no open load (correct load condition is detected if the corresponding output is switched off) Normal operation: high = output is on, low = output is off Open-load detection: high = open load, low = no open load (correct load condition is detected if the corresponding output is switched off) Description see LS1 Description see HS1 Description see LS1 Description see HS1 Description see LS1 Description see HS1 Description see LS1 Description see HS1 Description see LS1 Description see HS1 Short circuit detected: set high, when at least one output is switched off by a short circuit condition Inhibit: this bit is controlled by software (bit SI in input register) and hardware inhibit (Pin 17). High = standby, low = normal operation Power supply fail: over- or undervoltage at Pin VS detected
2 3 4 5 6 7 8 9 10 11 12 13 14 15 Note:
Status HS1 Status LS2 Status HS2 Status LS3 Status HS3 Status LS4 Status HS4 Status LS5 Status HS5 Status LS6 Status HS6 SCD INH PSF
1. Bit 0 to 15 = high: overtemperature shutdown
Power Supply Fail
In case of over-/undervoltage at Pin VS, an internal timer is started. When the overvoltage delay time (tdOV) programmed by the SCT Bit, or the undervoltage delay time (tdUV) is reached, the power supply fail bit (PSF) in the output register is set and all outputs are disabled. When normal voltage is present again, the outputs are enabled immediately. The PSF bit remains high until it is reset by the SRR bit in the input register. If the open-load detection bit (OLD) is set to low, a pull-up current for each high-side switch and a pull-down current for each low-side switch is turned on (open-load detection current IHS1-6, ILS1-6). If VVS-VHS1-6 or VLS1-6 is lower than the open-load detection threshold (open-load condition) the corresponding bit of the output in the output register is set to high. Switching on an output stage with OLD bit set to low disables the openload function for this output.
Open-load Detection
5
4545B-BCD-12/02
Overtemperature Protection
If the junction temperature exceeds the thermal prewarning threshold, TjPW set, the temperature prewarning bit (TP) in the output register is set. When temperature falls below the thermal prewarning threshold TjPW reset, the bit TP is reset. The TP bit can be read without transferring a complete 16-bit data word: with CS = high to low, the state of TP appears at Pin DO. After the microcontroller has read this information, CS is set high and the data transfer is interrupted without affecting the state of input and output registers. If the junction temperature exceeds the thermal shutdown threshold Tj switch off, the outputs are disabled and all bits in the output register are set high. The outputs can be enabled again when the temperature falls below the thermal shutdown threshold, Tj switch on, and when a high has been written to the SRR bit in the input register. Thermal prewarning and shutdown threshold have hysteresis.
Short-circuit Protection
The output currents are limited by a current regulator. Current limitation takes place when the over-current limitation and shutdown threshold (I HS1-6, ILS1-6 ) are reached. Simultaneously, an internal timer is started. The shorted output is disabled when during a permanent short the delay time (tdSd) programmed by the Short-Circuit Timer (SCT) bit is reached. Additionally, the Short-Circuit Detection (SCD) bit is set. If the temperature prewarning bit TP in the output register is set during a short, the shorted output is disabled immediately and SCD bit is set. By writing a high to the SRR bit in the input register, the SCD bit is reset and the disabled outputs are enabled. There are two ways to inhibit the U6815BM: 1. Set bit SI in the input register to zero 2. Switch Pin 17 (INH) to 0 V In both cases, all output stages are turned off but the serial interface stays active. The output stages can be activated again by bit SI = 1 or by Pin 17 (INH) switched back to 5 V.
Inhibit
6
U6815BM
4545B-BCD-12/02
U6815BM
Absolute Maximum Ratings
All values refer to GND pins
Parameters
Supply voltage Supply voltage, t < 0.5 s; IS > - 2 A Supply voltage difference Supply current Supply current, t < 200 ms Logic supply voltage Input voltage Logic input voltage Logic output voltage Input current Output current Output current Reverse conducting current (tpulse = 150 s) Junction temperature range Storage temperature range
Pins
5, 10 5, 10 |VS_Pin5 - VS_Pin10| 5, 10 5, 10 19 17 24 to 26 18 17, 24 to 26 18 1 to 4, 11 to 16 27, 28 2, 3, 12, 13, 15, 28 towards 5, 10
Symbol
VVS VVS DVVS IVS IVS VVCC VINH VDI, VCLK, VCS VDO IINH, IDI, ICLK, ICS IDO ILS1 to ILS6 IHS1 to IHS6 IHS1 to IHS6 Tj Tstg
Value
- 0.3 to +40 -1 150 1.4 2.6 -0.3 to +7 -0.3 to +17 -0.3 to VVCC + 0.3 -0.3 to VVCC + 0.3 -10 to +10 -10 to +10 Internally limited (see output specification) 17 -40 to +150 -55 to +150
Unit
V V mV A A V V V V mA mA mA mA A C C
Thermal Resistance
All values refer to GND pins
Parameters
Junction - pin, measured to GND, Pins 6 to 9 and 20 to 23 Junction ambient
Symbol
RthJP RthJA
Value
25 65
Unit
K/W K/W
Operating Range
All values refer to GND pins
Parameters
Supply voltage Logic supply voltage Logic input voltage Serial interface clock frequency Junction temperature Notes:
Pins
5, 10 19 17, 24 to 26 25
Symbol
VVS VVCC VINH, VDI, VCLK, VCS fCLK Tj
Min.
VUV
(1)
Typ.
5
Max.
40
(2)
Unit
V V V MHz C
4.5 -0.3
5.5 VVCC 2
-40
+150
1. Threshold for undervoltage detection 2. Output disabled for VVS > VOV (threshold for overvoltage detection)
7
4545B-BCD-12/02
Noise and Surge Immunity
Parameters
Conducted interferences Interference suppression ESD (human body model) ESD (machine model) Note: 1. Test pulse 5: VSmax = 40 V
Test Conditions
ISO 7637-1 VDE 0879 Part 2 MIL-STD-883D Method 3015.7 EOS/ESD - S 5.2
Value
level 4 (1) level 5 2 kV 150 V
Electrical Characteristics
7.5 V < VVS < 40 V; 4.5 V < VVCC < 5.5 V; INH = High; -40C < Tj < 150C; unless otherwise specified, all values refer to GND pins.
Parameters Current Consumption
Quiescent current (VS) Quiescent current (VCC) Supply current (VS) normal operating Supply current (VCC)
Test Conditions/Pins
VVS < 16 V, INH or bit SI = low Pins 5, 10 4.5 V < VVCC < 5.5 V, INH or bit SI = low, Pin 19 VVS < 16 V, Pins 5, 10 all output stages off all output stages on, no load 4.5 V < VVCC < 5.5 V, normal operating, Pin 19
Symbol
Min.
Typ.
Max.
Unit
IVS IVCC IVS IVS IVCC 0.8
40 20
A A
1.2 10 150
mA mA A
Internal Oscillator Frequency
Frequency (time-base for delay timers) fOSC 19 45 kHz
Over- and Undervoltage Detection, Power-on Reset
Power-on reset threshold Power-on reset delay time Undervoltage detection threshold Undervoltage detection hysteresis Undervoltage detection delay Overvoltage detection threshold Overvoltage detection hysteresis Overvoltage detection delay Overvoltage detection delay Pins 5, 10 Pins 5, 10 Input register, Bit 14 (SCT) = high Input register, Bit 14 (SCT) = low Pin 19 After switching on VVCC Pins 5, 10 Pins 5, 10 VVCC tdPor VUV DVUV tdUV VOV DVOV tdOV tdOV TjPWset TjPWreset DTjPW Tj switch off Tj switch on DTj switch off 150 130 7 1.75 125 105 145 125 20 170 150 20 190 170 7 18 1 21 5.25 165 145 3.4 30 5.5 0.4 21 22.5 3.9 95 4.4 160 7.0 V s V V ms V V ms ms C C K C C K
Thermal Prewarning and Shutdown
Thermal prewarning, set Thermal prewarning, reset Thermal prewarning hysteresis Thermal shutdown, off Thermal shutdown, on Thermal shutdown hysteresis Notes:
1. Only valid for version U6815BM-N. 2. Delay time between rising edge of CS after data transmission and switch-on output stages to 90% of final level.
8
U6815BM
4545B-BCD-12/02
U6815BM
Electrical Characteristics (Continued)
7.5 V < VVS < 40 V; 4.5 V < VVCC < 5.5 V; INH = High; -40C < Tj < 150C; unless otherwise specified, all values refer to GND pins.
Parameters
Ratio thermal shutdown, off/thermal prewarning, set Ratio thermal shutdown, on/thermal prewarning, reset
Test Conditions/Pins
Symbol
Tj switch off/ TjPW set Tj switch on/ TjPW reset
Min.
1.05 1.05
Typ.
1.17 1.2
Max.
Unit
Output Specification (LS1 - LS6, HS1 - HS6), 7.5 V < VVS < VOV
On resistance, low On resistance, high Output clamping voltage Output leakage current IOut = 600 mA, Pins 1, 4, 11, 14, 16 and 27 IOut = -600 mA, Pins 2, 3, 12, 13, 15 and 28 ILS1-6 = 50 mA, Pins 1, 4, 11, 14, 16, 27 VLS1-6 = 40 V, all output stages off, Pins 1, 4, 11, 14, 16 and 27 VHS1-6 = 0 V, all output stages off, Pins 2, 3, 12, 13, 15 and 28 Inductive shutdown energy
(1)
RDS On L RDS On H VLS1-6 ILS1-6 IHS1-6 Woutx dVLS1-6/dt dVHS1-6/dt ILS1-6 IHS1-6 tdSd tdSd ILS1-6 IHS1-6 ILS1-6/ IHS1-6 50 650 -1250 70 8.75 60 -150 1.2 0.6 0.6 200 950 -950 100 -10 40
1.5 2.0 60 10
W W V A A
Pins 1-4, 11-16, 27 and 28 Pins 1-4, 11-16, 27 and 28 Pins 1, 4, 11, 14, 16 and 27 Pins 2, 3, 12, 13,15 and 28 Input register, Bit 14 (SCT) = high Input register, Bit 14 (SCT) = low Input register, Bit 13 (OLD) = low, output off, Pins 1, 4, 11, 14, 16, 27 Input register, Bit 13 (OLD) = low, output off, Pins 2, 3, 12, 13, 15, 28
15 400 1250 -650 140 17.5 200 -30
mJ mV/ s mA mA ms ms A A
Output voltage edge steepness Overcurrent limitation and shutdown threshold Overcurrent shutdown delay time Open load detection current
Open load detection current ratio Open load detection threshold Input register, Bit 13 (OLD) = low, output off, Pins 1, 4, 11, 14, 16, 27 Input register, Bit 13 (OLD) = low, output off, Pins 2, 3, 12, 13, 15, 28 Output switch on delay (2) RLoad = 1 kW RLoad = 1 kW
VLS1-6 VVS- VHS1-6 tdon tdoff
4 4 0.5 1
V V ms ms
Inhibit Input
Input voltage low level threshold Input voltage high level threshold Hysteresis of input voltage Pull-down current Notes: Pin 17 Pin 17 Pin 17 VINH = VVCC, Pin 17 VIL VIH DVI IPD 100 10 0.3 VVCC 0.7 VVCC 700 80 V V mV A
Serial Interface - Logic Inputs (DI, CLK, CS)
1. Only valid for version U6815BM-N. 2. Delay time between rising edge of CS after data transmission and switch-on output stages to 90% of final level.
9
4545B-BCD-12/02
Electrical Characteristics (Continued)
7.5 V < VVS < 40 V; 4.5 V < VVCC < 5.5 V; INH = High; -40C < Tj < 150C; unless otherwise specified, all values refer to GND pins.
Parameters
Input voltage low level threshold Input voltage high level threshold Hysteresis of input voltage Pull-down current, Pins DI and CLK Pull-up current Pin CS
Test Conditions/Pins
Pins 24-26 Pins 24-26 Pins 24-26 VDI, VCLK = VVCC, Pins 25, 26 VCS= 0 V, Pin 24 IOL = 3 mA, Pin 18 IOL = -2 mA, Pin 18 VCS = VVCC, 0 V < VDO < VVCC, Pin 18
Symbol
VIL VIH DVI IPDSI IPUSI VDOL VDOH IDO
Min.
0.3 VVCC
Typ.
Max.
Unit
V
0.7 VVCC 50 2 -50 500 50 -2 0.5 VVCC-1 V -10 10
V mV A A V V mA
Serial Interface - Logic Output (DO)
Output voltage low level Output voltage high level Leakage current (tristate) Notes:
1. Only valid for version U6815BM-N. 2. Delay time between rising edge of CS after data transmission and switch-on output stages to 90% of final level.
Serial Interface - Timing
Parameters
DO enable after CS falling edge DO disable after CS rising edge DO fall time DO rise time DO valid time CS setup time CS setup time CS high time VDO < 0.2 VVCC Input register, Bit 14 (SCT) = high Input register, Bit 14 (SCT) = low CLK high time CLK low time CLK period time CLK setup time CLK setup time DI setup time DI hold time Note: 1. see Figure 4
Test Conditions
CDO = 100 pF CDO = 100 pF CDO = 100 pF CDO = 100 pF CDO = 100 pF
Timing Chart No. (1)
1 2 10 4 8 9 9 5 6 7 3 11 12
Symbol
tENDO tDISDO tDOf tDOr tDOVal tCSSethl tCSSetlh tCSh tCSh tCLKh tCLKl tCLKp tCLKSethl tCLKSetlh tDIset tDIHold
Min.
Typ.
Max.
200 200 100 100 200
Unit
ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
225 225 140 17.5 225 225 500 225 225 40 40
10
U6815BM
4545B-BCD-12/02
U6815BM
Figure 4. Serial Interface Timing Diagram with Chart Numbers
1 2
CS
DO
9
CS
4
7
CLK
5 3 6 8
DI
11
CLK
10
12
DO
Inputs DI, CLK, CS: High level = 0.7 VCC, Low level = 0.3 VCC Output DO: High level = 0.8 VCC, Low level = 0.2 VCC
For chart numbers, see Table Serial Interface - Timing, page 10.
11
4545B-BCD-12/02
Figure 5. Application Circuit
Vcc U5021M WATCHDOG
Enable HS1 HS2 13 HS3 12 HS4 3 HS5 2 HS6 28 Vs
Fault Detect Fault Detect Fault Detect Fault Detect Fault Detect Fault Detect
Trigger
Reset
15
5 VS 10 VS
GND
BYT41D VBATT 13V
DI
26 Osc
S I SO CL TD H S
CLK
25
6655
L S
H S
L S
H S 4
L S 4
H S 3
L S 3
H S 2
L S 2
H S 1
L S 1
R R
S Control logic
VS OV protection VS UV protection Thermal protection P - ON Reset Vcc
6 7 8 9
GND GND
C
CS
INH
24 17 18
Input Register Output Register
P S F I N H S C D H S 6 L S 6 H S 5 L S 5 H S 4 L S 4 H S 3 L S 3 H S 2 L S 2 H S 1 L S T P
GND
1
20GND 21GND 22GND 23GND
DO
Fault Detect
Fault Detect
Fault Detect
Fault Detect
Fault Detect
Fault Detect
Vcc Vcc 16 LS1 14 LS2 11 LS3 4 LS4 LS5 1 27 LS6
19 Vcc
Vs
Vs
Application Notes
It is strongly recommended to connect the blocking capacitors at VCC and VS as close as possible to the power supply and GND pins. Recommended value for capacitors at VS: Electrolythic capacitor C > 22 F in parallel with a ceramic capacitor C = 100 nF. Value for electrolytic capacitor depends on external loads, conducted interferences and reverse conducting current IHSx (see table Absolute Maximum Ratings). Recommended value for capacitors at VCC: Electrolythic capacitor C > 10 F in parallel with a ceramic capacitor C = 100 nF. To reduce thermal resistance, it is recommended to place cooling areas on the PCB as close as possible to the GND pins.
12
U6815BM
4545B-BCD-12/02
+
Vcc
Vcc 5V
+
U6815BM
Ordering Information
Extended Type Number
U6815BM-NFL U6815BM-NFLG3
Package
SO28 SO28
Remarks
Tubed Taped and reeled
Package Information
Package SO28
Dimensions in mm
18.05 17.80 9.15 8.65 7.5 7.3
2.35 0.4 1.27 28 16.51 15 0.25 0.10 0.25 10.50 10.20
technical drawings according to DIN specifications
1
14
13
4545B-BCD-12/02
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4545B-BCD-12/02 xM

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