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the performance, characteristics, and functions of the described products in the independent state, and are not
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customer
's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer
'sproductsor
equipment.
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92408 MS PC B8-9096 No.A0879-1/20
LB11691
Overview
The LB11691 are three-phase bipolar PWM drive pre-driver ICs that allow the output circuits to be implemented using
only n-channel FETs. These ICs can implement, at low cost, high-efficiency drive circuits in applications that use motors
that require high drive currents. These ICs include a built-in Hall sensor signal F/V conversion circuit and can provide a
voltage that is proportional to motor speed for use, for example, in speedometers for electric bicycles. These ICs also
support use in applications that holds the speed controlled at a constant rate as the load varies.
Features
Three-phase bipolar PWM drive (high and low side n-channel FET drive)
Maximum supply voltage : 45V
Gate drive voltage : about 10V (high and low side n-channel FETs)
Hall sensor signal F/V conversion circuit (one-shot multivibrator output)
Synthesized three-phase Hall sensor signal output
Built-in current limiter and undervoltage protection circuits
Specifications
Absolute Maximum Ratings at Ta = 25
°C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage 1
VCC max
VCC pin
45
V
Supply voltage 2
VB max
VB pin
60
V
Output current 1-1
IO max1
UL, VL, and WL pins
50
mA
Output current 2-1
IO max2-1
UH, VH, and WH pins sink current
30
mA
Output current 2-2
IO max2-2
UH, VH, and WH pins source current
40
mA
RF pin application voltage
VRF max
4V
LVS pin application voltage
VLVS max
60
V
Continued on next page.
Monolithic digital IC
Pre-Driver IC for Brushless
Motor Drive in Electric Bicycles
Ordering number : ENA0879