N1004340108 IC, regulatorL481010 V 0.4 A SOT194
N2004301182IC, 2 x op.amp.LM2902SO14S
N3004303440 IC, af amp+mute +4/30v dil1TDA1905DIL16S
N4014305236 IC, 2 x comp.LM2903SO8S
N4024301062 IC, regulatorLP2951ACSO8S
X1005414943 Dc–jack d6.3/2 pcb
X2005407016 Jack stereo 2.5mm smd
X3005416640 Pin header m1x2 p1.5 90deg 1a0r021A0R02
X4005416638 Connector 8–pole right angle 1.51.5
9853924 PCB DH3 116.9X61.0X1.6 D 3/PA
9853924 PC boardDH3116.9x61.0x1.6 d 3/pa
Original 03/97
Page 15
Page 3
Technical DocumentationPHF–1
C4032309517 Ceramic cap.100 n10 % 50 V 1206
C4042309517 Ceramic cap.100 n10 % 50 V 1206
C4052310544 Ceramic cap.1.0 n5 % 50 V 0805
C4062310752 Ceramic cap.10 n20 % 50 V 0805
C4082310752 Ceramic cap.10 n20 % 50 V 0805
C4092604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C4102502736 Electrol. cap.220 u20 % 16 V 3.5MM
C4112310449 Ceramic cap.150 p5 % 50 V 0805
C5012310505 Ceramic cap.470 p5 % 50 V 0805
C5022310505 Ceramic cap.470 p5 % 50 V 0805
C5032310505 Ceramic cap.470 p5 % 50 V 0805
C5042310505 Ceramic cap.470 p5 % 50 V 0805
C5052310505 Ceramic cap.470 p5 % 50 V 0805
C5062320075 Ceramic cap.470 p5 % 50 V 0603
C5072312410 Ceramic cap.1.0 u10 % 16 V 1206
C5082310424 Ceramic cap.100 p5 % 50 V 0805
C5092310424 Ceramic cap.100 p5 % 50 V 0805
C5152501605 Electrol. cap.100 u20 % 35 V RM3.5
L0010164030 Choke9 u
L0020164030 Choke9 u
L4003607555 Coil125 u2 A d17x12mm
L4010164030 Choke9 u
L5013616705 ChokeRI n2 A
Z0013640011Filt z>600r/100m 0r6max 0.2a 08050805
V0014103496 Trans. supr.33V400 V 5000 W d9.1xl9.1
V0104210108 TransistorBSR20pnp 12 V 0.6 A SOT23
V0114107040 Zener diodeBZX845 % 6.2 V 0.3 W SOT23
V0124108639 Diode x 2BAS2875 V 250 mA SOT143
V0144108639 Diode x 2BAS2875 V 250 mA SOT143
V0204210106 TransistorBSR19npn 14 V 0.6 A SOT23
V0304210106 TransistorBSR19npn 14 V 0.6 A SOT23
V0404200610 MosFetp–ch 50 V 5.3 A TO252
V0414107026 Zener diodeBZX845 % 7.5 V 0.3 W SOT23
V2024210106 TransistorBSR19npn 14 V 0.6 A SOT23
V2034100285 Diode x 2BAV9970 V 200 mA SER.SOT23
V4004215954 MosFet RFD14N05n–ch 50 V 10 A TO252
V4014210106 TransistorBSR19npn 14 V 0.6 A SOT23
V4024210108 TransistorBSR20pnp 12 V 0.6 A SOT23
V4034108639 Diode x 2BAS2875 V 250 mA SOT143
V4044108639 Diode x 2BAS2875 V 250 mA SOT143
V4054110034 Schottky diodeMBRS14040 V 1 A DO214AA
V4064107160 Zener diodeBZX845 % 12 V 0.3 W SOT23
V4074107027 Zener diodeBZX845 % 16 V 0.3 W SOT23
V4084108639 Diode x 2BAS2875 V 250 mA SOT143
V4094108639 Diode x 2BAS2875 V 250 mA SOT143
V4104200917 TransistorBC848B/BCW32npn 30 V 100 mA SOT23
V4114107160 Zener diodeBZX845 % 12 V 0.3 W SOT23
V4124107027 Zener diodeBZX845 % 16 V 0.3 W SOT23
Page 14
Original 03/97
Page 4
Technical DocumentationPHF–1
R4071413635 Chip resistor100 k5 % 0.1 W 0805
R4081415872 Melf resistor120 1 % 0.2 W 0204
R4091415600 Melf resistor1.0 k1 % 0.2 W 0204
R4101411123Melf resistor0.22 5 % 0.2 W 0204
R4111412423 Chip resistor4.7 k5 % 0.1 W 0805
R4121415745 Chip resistor3.32 k1 % 0.12 W 1206
R4131412423 Chip resistor4.7 k5 % 0.1 W 0805
R4141411669Chip resistor22 5 % 0.1 W 0805
R4151412416 Chip resistor2.2 k5 % 0.1 W 0805
C0012310336 Ceramic cap.18 p5 % 50 V 0805
C0112604431 Tantalum cap.10 u20 % 16 V 6.0x3.2x2.5
C0122310784 Ceramic cap.100 n10 % 25 V 0805
C1112503072 Electrol. cap.470 u20 % 16 V 10x16
C2012604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C2022310336 Ceramic cap.18 p5 % 50 V 0805
C2062310336 Ceramic cap.18 p5 % 50 V 0805
C2072310336 Ceramic cap.18 p5 % 50 V 0805
C2082310336 Ceramic cap.18 p5 % 50 V 0805
C2092310336 Ceramic cap.18 p5 % 50 V 0805
C2102310336 Ceramic cap.18 p5 % 50 V 0805
C2112310336 Ceramic cap.18 p5 % 50 V 0805
C2122310336 Ceramic cap.18 p5 % 50 V 0805
C2132604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C2142310336 Ceramic cap.18 p5 % 50 V 0805
C2152604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C2162604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C2172310449 Ceramic cap.150 p5 % 50 V 0805
C2182604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C2192604209 Tantalum cap.1.0 u20 % 16 V 3.2x1.6x1.6
C2202310336 Ceramic cap.18 p5 % 50 V 0805
C2312310720 Ceramic cap.3.3 n20 % 50 V 0805
C2322310784 Ceramic cap.100 n10 % 25 V 0805
C2332310336 Ceramic cap.18 p5 % 50 V 0805
C2352310784 Ceramic cap.100 n10 % 25 V 0805
C2362310784 Ceramic cap.100 n10 % 25 V 0805
C2502310784 Ceramic cap.100 n10 % 25 V 0805
C2512310336 Ceramic cap.18 p5 % 50 V 0805
C3012502736 Electrol. cap.220 u20 % 16 V 3.5MM
C3022310336 Ceramic cap.18 p5 % 50 V 0805
C3032310784 Ceramic cap.100 n10 % 25 V 0805
C3042604431 Tantalum cap.10 u20 % 16 V 6.0x3.2x2.5
C3052310784 Ceramic cap.100 n10 % 25 V 0805
C3062310784 Ceramic cap.100 n10 % 25 V 0805
C3072604431 Tantalum cap.10 u20 % 16 V 6.0x3.2x2.5
C3082310784 Ceramic cap.100 n10 % 25 V 0805
C3092310784 Ceramic cap.100 n10 % 25 V 0805
C4012309517 Ceramic cap.100 n10 % 50 V 1206
C4022501605 Electrol. cap.100 u20 % 35 V RM3.5
Original 03/97
Page 13
Page 5
Technical DocumentationPHF–1
Parts List EDMS issue 1.2Code: 0200179
ITEMCODEDESCRIPTIONVALUETYPE
R0111413635 Chip resistor100 k5 % 0.1 W 0805
R0121412536 Chip resistor22 k5 % 0.1 W 0805
R0131413635 Chip resistor100 k5 % 0.1 W 0805
R0151412430 Chip resistor10 k5 % 0.1 W 0805
R0211413635 Chip resistor100 k5 % 0.1 W 0805
R0221413635 Chip resistor100 k5 % 0.1 W 0805
R0311413635 Chip resistor100 k5 % 0.1 W 0805
R0321412430 Chip resistor10 k5 % 0.1 W 0805
R0411413635 Chip resistor100 k5 % 0.1 W 0805
R2011413635 Chip resistor100 k5 % 0.1 W 0805
R2021413635 Chip resistor100 k5 % 0.1 W 0805
R2121413635 Chip resistor100 k5 % 0.1 W 0805
R2131412416 Chip resistor2.2 k5 % 0.1 W 0805
R2141414029 Chip resistor3.3 k5 % 0.1 W 0805
R2151414131 Chip resistor180 k5 % 0.1 W 0805
R2161414212 Chip resistor330 k5 % 0.1 W 0805
R2171414283 Chip resistor100 k1 % 0.1 W 0805
R2201414283 Chip resistor100 k1 % 0.1 W 0805
R2211412430 Chip resistor10 k5 % 0.1 W 0805
R2221412335 Chip resistor1.0 k5 % 0.1 W 0805
R2231412430 Chip resistor10 k5 % 0.1 W 0805
R2241412430 Chip resistor10 k5 % 0.1 W 0805
R2251412430 Chip resistor10 k5 % 0.1 W 0805
R2261414283 Chip resistor100 k1 % 0.1 W 0805
R2271414283 Chip resistor100 k1 % 0.1 W 0805
R2311414283 Chip resistor100 k1 % 0.1 W 0805
R2321414283 Chip resistor100 k1 % 0.1 W 0805
R2331414283 Chip resistor100 k1 % 0.1 W 0805
R2341414283 Chip resistor100 k1 % 0.1 W 0805
R2351414109 Chip resistor15 k5 % 0.1 W 0805
R2361412430 Chip resistor10 k5 % 0.1 W 0805
R3011413829 Chip resistor10 5 % 0.1 W 0805
R3021413829 Chip resistor10 5 % 0.1 W 0805
R3031412261 Chip resistor100 5 % 0.1 W 0805
R3041412416 Chip resistor2.2 k5 % 0.1 W 0805
R3051412261 Chip resistor100 5 % 0.1 W 0805
R3081414109 Chip resistor15 k5 % 0.1 W 0805
R3091412430 Chip resistor10 k5 % 0.1 W 0805
R4011415784 Melf resistor4.75 k1 % 0.2 W 0204
R4021413635 Chip resistor100 k5 % 0.1 W 0805
R4031411669Chip resistor22 5 % 0.1 W 0805
R4041412423 Chip resistor4.7 k5 % 0.1 W 0805
R4051413635 Chip resistor100 k5 % 0.1 W 0805
Page 12
Original 03/97
Page 6
Technical DocumentationPHF–1
Layout Diagrams of DH3
Original 03/97
Page 11
Page 7
Circuit Diagram of DH3
Technical DocumentationPHF–1
Page 10
Original 03/97
Page 8
Technical DocumentationPHF–1
Block Diagram
Original 03/97
Page 9
Page 9
Audio Section
V202, R201 and R202 generates +5VA audio d.c. voltage. V202 is the microphone voltage regulator. N200 is the mic. amplifier. N200 is the differential amplifier wich eliminates disturbancies generated in curly cable ground wire resistor. N200 has same function in XEAR line. R235 and C231 are low pass filter
wich eliminates noise. N300 is speaker power amplifier. R302, R303 and C303
stabilicies the power amplifier in high frequencies.
Technical DocumentationPHF–1
Page 8
Original 03/97
Page 10
Technical DocumentationPHF–1
System Connector X400
PinNameDescription
1VCSupply voltage
2M2BUSSerial bidirectional data control.
3PHFSHF device power on/off
4GNDGround
5AGNDAudio ground.
6XEAR/HFJPWRExt. audio/HF junction box identification.
7XMIC/JCONNExt. mic./HF box connection control signal.
8AGNDAudio ground.
Circuit Description
Input Circuit
C1 is the EMI capacitor. F1 is the foil fuse. L1 and L2 are EMI suppressor
chokes. V1 is the voltage suppressor diode (zener type).
Power Control Logic
Input power is connected to d.c. connector X100. Power is connected to audio
devices thru P–FET V410 and 10 V regulator N100 (VBSW). This power is connected when M2BUS signal goes high. Also XEAR signal can connect power
on 5 sec by grounding it with 100 kΩ resistor, wich is located inside the phone.
Same 5 sec power on time occurs also, when MBUS and XEAR are low and
input power occurs to d.c. connector. C11 acts like a timing capacitor.
Switched Mode Power Supply
The WBSV voltage generated by N100 starts the switched mode power supply
(SMPS) by starting reference regulator N402. V409 leads the initial current to
totally empty battery. V410 is an constant current source wich sets the voltage
value of R408. Same voltage occurs over the current shunt resistor R410,
when the SMPS is working. N401a is an pulse width modulator. N401b with
R407,C408 and V408 generates a minimum pulse width of SMPS. R405 and
R406 are input and output voltage correction resistors. V412 shutdowns the
SMPS when VB input voltage goes over 17 V. V407 limits the comparator power supply VCC. V408 and V406 limits the comparator output voltage. V403 and
C403 consist an bootstrap circuit, wich act like voltage doubler. V400 is the
SMPS switch. L401 (L402), R403 and C405 are EMI suppression components.
L400 is the main SMPS inductor. V411 limits the maximum output voltage.
Original 03/97
Page 7
Page 11
External Signals and Connections
The module has four external connectors, the power supply connector, HF microphone connector, HF speaker connector and system connector.
Power Supply Connector X100
PinNameDescription
1VCSupply voltage
2GNDGround
HF Microphone Connector X200
PinNameDescription
Technical DocumentationPHF–1
• pwr off current: 0.8...1 mA
• pwr on/no charging current: 50...90 mA
• pwr on/charging current: 600...800 mA
1GNDGround
2HFMICMicrophone signal
HF Speaker Connector X300
PinNameDescription
1HFSPSpeaker signal
2GNDGround
• output voltage: 5.0...5.8 V
• intrnal resistance: 2200 Ω
• input impedance: 1000 Ω
• load impedance: 4 Ω
• output power: 3 W
Page 6
Original 03/97
Page 12
Technical DocumentationPHF–1
The phone is connected to the unit by a system connector. There are also connectors for external power source, for standard HF–microphone and for external antenna(s).
The Compact Handsfree Holder consists of speaker– and microphone– amplifiers, power on/off –logic, HF–speaker muting and the constant current switching regulator for charging the phone battery. The unit has an inbuilt HF–speaker and an external HF–microphone but the actual handsfree function is
generated in the phone.
MPHF1 mechanic consists of the front and rear covers, the holder cover,
The
screws, type label, system–cable with RF–cable(s).
Modes of Operation
Power off:The DH3 module does not receive supply voltage
to the d.c. connector (X100 so there aro not any
voltages on the module.
Standby:The module receives supply voltage to the d.c.
connector but the telephone has put the M2BUS line
(X400) down (”0”–state) because the phone is off and
the battery is fully charged. The switching regulator in
off and there is not any supply voltage for the audio.
Power on/The M2BUS –line is high (”1”–state) so the switching
speaker off:regulator supplies charging current to the phone. The
supply voltage for the audio is on but the PHFS –line
(X400) is down (”0”–state) so the HF–speaker is muted.
Power on/The switching regulator supplies charging current to
speaker onthe phone. The supply voltage for the audio is on and
the PHFS–line is high (”1”–state) so the HF–speaker
is on.
Original 03/97
Page 5
Page 13
Compact HF Holder PHF–1
Introduction
The PHF–1 is compact handsfree holder for the second generation digital
handportable telephones and they provide possibility to use handsfree operation where the fixed handsfree configuration is not possible. They have also
phone battery charging function.
Technical DocumentationPHF–1
Technical Summary
The installation to the car is possible by four separate methods. Using the separate mounting plate, strechable bands, adhesive tape, or ”velco straps”.
The configuration allows both the handsfree– and the handset–use of the
phone. The handset–use is possible with the curly system cable which includes
also the antenna cable(s). The separation of the HF– and hs–mode is made by
the hook–switch in the holder .