HA13705 Hitachi Semiconductor, HA13705 Datasheet - Page 17

• Manufacturer Part Number: HA13705
• Description: IPIC Intelligent Power IC High Side Solenoid Driver
• Manufacturer: Hitachi Semiconductor

Notes: 1. The operation threshold voltage of Vps or Vdd is determined by resistor R101, R102 or R107,
2. The relation between PWMDAC input VIPWMH, VIPWML for VCM driver current control and VCM
3. The 3rd order LPF at next stage of PWMDAC is characterized by internal OP amp. and capacitor
• for Vps
where, Vsd1 : Operating voltage of the power monitor [V] (refer to Electrical Charasteristics)
• for Vdd
where, Vhys4 : Hysteresis voltage of the power monitor [V] (refer to Electrical Charasteristics)
where, VREF
VREF
POR
(for Vdd)
12VGOOD
(for Vps)
R108 as follows.
Recovery
voltage
Cut off
voltage
Recovery
voltage
Cut off
voltage
driver input (VCMIN – VREF) is determined by following equation. (refer to below figure)
VCMIN
C1, C2, C3 and resistor R2, R3. These components value are determined by following equations.
C1 =
VIPWMH
VIPWML
2
Vhys3 : Hysteresis voltage of the power monitor [V] (refer to Electrical Charasteristics)
DPWMH
DPWML
VREF =
R1=R1L//R1H//R0
1
fc R1
Vup(Vps) = (Vsd1 + Vhys3)
Vdwn(Vps) = Vsd1
Vup(Vdd) = (Vsd1 + Vhys4)
Vdwn(Vdd) = Vsd1
=740
R1H
R1L
: Internal reference voltage [V] (refer to Electrical Charasteristics)
: Duty of input signal on terminal VIPWMH [%]
: Duty of input signal on terminal VIPWML [%]
6500
6.4
DACOUT
R0
Vdwn
[F]
(64 DPWMH + DPWML)
VREF
5.3V
C1
R2
1 +
1 +
Vup
R101
R102
R107
R108
C2
R3
OP2OUT
1 +
VCMIN
1 +
C3
OP2IN(+)
R101
R102
R107
R108
GND
[V]
[V]
Vps
R4
R5/R4=0.604
3.2
OPAmp.2
[V]
[V]
+
R5
5.3V
5.3 3.2V
to VCM driver
VREF
VCMIN
(1)
(2)
(1)’
(2)’
(3)
(4)
HA13614FH
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