LB11600JV_11 SANYO [Sanyo Semicon Device], LB11600JV_11 Datasheet - Page 24

• Manufacturer Part Number: LB11600JV_11
• Description: Brushless Motor Predriver IC for Automotive Applications
• Manufacturer: SANYO [Sanyo Semicon Device]

<Reset time (Trest f) due to the PWMRE pin (CTL+ buffer input mode) when V CC = 5V>
1.
The rise potential (V1) and fall potential (V2) due to the on/off duty due to the TOC potential and the PWM triangle wave
When the TOC potential rises and the PWM triangle wave rise is slow, the IC will be in the ON duty state at startup.
This results in the time Tpwmra, which is the time until the PWM triangle wave low level is reached.
The potential difference due to each input pulse is: ΔV = V2 - Vpwmra.
The time (n times the PWMIN period) required for the potential, which is increased by the V2 potential difference (ΩV)
on each input pulse, to exceed the threshold voltage (Vth = 1.25V) is the reset period (Trest).
2.
The time required for the sum of the potentials due to the times set for each on/off duty ratio for the rise time to exceed the
threshold voltage (1.25V) becomes the reset time (Trest).
The times t1 and t2 for the rise potential (V1) and fall potential (V2) due to each on duty ratio will differ. Thus these must
be calculated individually for each input pulse signal. The formulas for calculating V1 and V2 are the same as for the
PWMIN input case.
CTL+ input mode (When the TOC potential is higher than the PWM triangle wave rise)
CTL+ input mode (When the TOC potential rises after the PWM triangle wave rises)
When on:
When off:
Vpwmra = (Ipwm × Tpwmra) / Cpwm
Ipwm:
Cpwm:
Ipwmre:
V0:
C:
R:
t1:
t2:
V2 + ΔV + ΔV⋅⋅⋅ ≥ 1.25V
Trest ≤ TPWMIN × n + Tpwmra (s)
V1 = (V0 - Ipwmre × R) × e-t1/RC + Ipwmre × R
V2 = V1 × e-t2/RC
PWM pin charge current: 45µA (typical)
Capacitance of the PWM pin external capacitor
PWMRE pin charge current: 200µA (typical)
PWMRE pin initial potential: 0 V
Capacitance of the PWMRE pin external capacitor
Resistance of the PWMRE pin external resistor
PWMIN pin input duty on time
PWMIN pin input duty off time
LB11600JV
No.8321-24/30