1. Add 1.5µF or 2.2µF 100V capacitor between B+A and GND. Better performance of X7R capacitor.
2. connect backside of die to AGND.
both of these two recommendations are for EMC concern.
If die has no back metal. we recommend customer use epoxy technology (silver glue), and also connect backside to GND.
For epoxy technology (silver glue 银浆工艺)， please refer to attachment.
For die sales products, we only accept CQC that already no gel above the die.
Before starting FA, we need to remove the die from brush holder or PCB. And then rebond into a special package. If gel is not removed, the die cannot be rebond. Please make sure the die is totally gel removed. Otherwise, FA cannot do wire bond.
Gel remove recipe:
Can be: MOMENTIVE Silopren* Silicone Remover TP 3888
Soak time: 1-24h
Chemical Product refresh (3cycle)
If we take the example of a 100A alternator and a blind zone at 12%. 100% DC corresponds to 100A load on the stator, so that means the LRC will be started only if the load increase is more than 12A. This is a rough estimation that does not take into account the alternator efficiency (which is low at low speed).
When customer get a parameter documents form OEM, some parameter may have different name with NXP Alternator Regulator Spec. Here is a brief guide to help you understand, who of them are talking about the same thing.
Regulation Voltage (With "C")
none option value
Pair of poles
BULB / LED
Sense Pad use& RVS/Sense
与ECU连接的端子 FR: FM pin L: Lamp pin C: RVC/Sense=RVS
FR / L / C
FR / DF
磁场反馈（EXC的波形同向或者反向复制到FM端，输出给ECU用于判断当前励磁电流） FR：反向 DF：同向
预励磁： 在正式发电以前的励磁 电机在转速达到切入转速（cut-in speed）或者在自启动（selfstart）模式达到自启动转速（Nself start）之后开始发电
励磁DC从Min DC到Max DC分成了多少步 CPNG 一步是1.5mV
EXC Minimum Duty
EXC Maximum Duty
none option value
FM Duty Range
1.5 ~ 98.5
FM Swtching Frequency
Self-start of Alternator
WOT（Wide Open Throttle）
Aux（Auxiliary load ）
No gradient，refresh on the fly
Number of poles for IIR filter
see LIN 2.0 spec. Chap. 2.5.1 or LIN 2.1 spec. chap. 18.104.22.168 Assign frame ID range is used to set or disable PIDs up to four frames. It is important to notice that the request provides the protected identifier, i.e. the frame identifier and its parity. Furthermore, frames with frame identifiers 60 (0x3C) to 63 (0x3F) can not be changed (diagnostic frames and reserved frames).
Vset: Set voltage. In LIN mode, The regulation voltage set by LIN RX frame. // 设定调节电压。 LIN 调节模式下， Vset 为 LIN 协议 RX 帧设定的调节电压值；默认模式下， Vset 为 OTP 中写入的默认调节电压。
Vreg：Regulation voltage. the actual value that device regulate. During Thermal compensation or LIN timeout, Vreg is not equal to Vset. //调节电压。芯片实际工作中调节的目标电压值。温度补偿或者LIN超时，实际的调节电压Vreg会不等于Vset。
In pre excitation mode 2, you can have any duty cycle between pre exc value and 100% depending on battery and Vset voltage. On some alternators, with high duty cycles, the switching of excitation causes so much noise through the phase that this noise can be interpreted as valid phase signal. Thus, the device can go to regulation. To avoid that, we added the ability to deglitch the phase input only in pre excitation mode 2 to be sure that the signal we have are real phase signals. Depending on the duration of the noise our customer can see during pre excitation mode2, they can set the value of deglitcher. If they don't use pre excitation mode2, this value is "don't care".
Blind Zone is designed a current gap when excitation start raising at very beginning. This feature is designed for a mechanical coupling delay time when engine start.
Customer can fuse the blind zone as initiation, or config/inhibit blind zone by LIN command.
Customer can refer to the attachment truth table find the blind zone result.
LIN have higher priority.
when BZI(OTP)=BZI(LIN)=1, BZ output=0%
For other cases:
1. LIN mode: BZ=BZ(LIN)
2. Defult mode: BZ=BZ(OTP)
Version A & B
MC33AR6000(LIN2112 is nick name) have advanced Excitation current feedback and protection. But different current value is been used in different condition.
1. Current measurements:
Excitation control is a MOS ON/OFF PWM. During MOS ON, current raise, during MOS OFF, current decrease, as motor parasitic inductance. Current measurement only happens during MOS ON. IC catch sample current value Sn in every 10-15us, . When MOS OFF, current measurement value Iexc=ΣSn/n.
2. Iexc current feedback by LIN
MC33AR600 can report Iexc value by LIN. The report value Iexc_LIN= ΣIexcx/X, X is number of excitation cycles happens during two LIN current command.
3. Current limitation
current limitation is compare Iexc to Iexc_limit threshold.
Be careful, Iexc is an average value. Iexc>Iexc_limit trigger limitation on next excitation cycle. So current limitation dose not mean limitation action happen once current real time value reach the limitation threshold.
EXC current measurement:
1. sampling Iexc every 10-15μs when MOS ON. (S0,S1,...Sn)
2. calculate average value of the sampes in one period. ( D=(S0+S1+S2+..Sn)/n)
3.report D to digital core. D = Iexc.
4. calculate average of D value in Ffilter_Iexc (selected by OTP) period. Reprot to ECU by LIN. (Iexc_LIN=(D0+D1+...Dx)/X
EXC current limitation:
1. once detect Iexc(D)>Ilimit, the duty cycle(DC) in next period is minimum duty cycle(celected by OTP).
2. once Iexc<Ilimit , the next duty cycle back to normal regulation DC. -- other words, the current limit function is refreshed by regulation requency(200Hz).
MC33AR6000 support OTP (one time program).
IC has a RAM register and a Fuse array.
Customer can write configuration data into RAM (Power off erase), check the data is write correct, then burn into fuse array.
Follow the guide in attachment. it will become easy for you.