Hypertriton as a test of theoretical hyperon-nucleon potentials. II

A separable approximation to meson theoretic hyperon-nucleon potentials is made such that low-energy-scattering parameters are reproduced. Explicit $\Lambda N-\Sigma N$ coupling is neglected. The important tensor nature of triplet force is included. Several recently proposed hyperon-nucleon potentials lead to acceptable ${}_{\Lambda }{}^3{}_{}{}^{}\mathrm{H}$ binding energy estimates.